Math mind hacks: Solve it many ways

Solve Many Ways

 

Math Mind Hacks is a series of mini-posters about quick, smart activities that grow mathematical minds. Today’s poster is inspired by a quote from George Polya, a mathematics educator most famous for his work on accessible, meaningful, fun problem-solving techniques. The quote came to me via Alexandre Borovik of the De Morgan Forum

Like It? Share It.
  • Digg
  • StumbleUpon
  • del.icio.us
  • Facebook
  • Yahoo! Buzz
  • Google Bookmarks
  • email
  • Posterous
  • RSS
  • Tumblr
Posted in Grow

1001 Leaders – Interview with Jane Kats

This is an interview with Jane Kats, an early childhood educator, math circle leader, author and math enthusiast.

Jane talks about her math circles, what parents can do to help kids enjoy math, and what they should avoid. Jane shares a couple of activities for you to try with your children.

In our 1001 Circles series, we feature math circles stories from the point of view of a circle leader, who acts as an invisible tour guide. But math circle leaders have to do more than tell stories. They bring together the kids and the math, so that the end result, the circle, is more than the sum of its parts. In 1001 Leaders, the companion series to our 1001 Circles, we put the spotlight on the leaders themselves. What got them started and what keeps them going? What are their math dreams and worries? If you lead a math circle, an engineering club, or an informal playgroup, we would like to hear your story or interview you. Write moby@moebiusnoodles.com to talk about your adventures.


When it comes to early childhood education, Jane seems to do it all, from organizing math circles and family game nights to leading summer camps in Russia, Germany, France, Israel, and the US. In between, she also updates her blog (in Russian). Her energy and love for math are both inspiring and contagious. Her blog and her books, some of which are available in English, are overflowing with games, ideas and insights into how children learn – and not just math.

We asked Jane about her math journey and the advice she can share for helping young kids discover the beautiful adventurous math.

Let’s begin!

Moebius Noodles: Tell us a bit about yourself, please.

Jane Kats: I am 40 years old and have two teenagers; Galina is 14 and Grigoriy is 16. I like to play games, draw, talk to people, travel, and share things that I love, such as games and math. In high school I was in an intensive math program and loved to participate in various math olympiads.

When my children started school, I began leading a math circle for kids in elementary grades. Over time, I began a circle for younger kids (preschoolers and kindergarteners).

I enjoy coming up with ways to explain math problems to children and I am patient if they don’t know or don’t understand something.

Jane Katz chalk graphs

MN: What are some of your worries and dreams about your work? How does it feel, doing what you do?

JK: I believe that the biggest mistake adults make is the attitude that “you don’t need to understand, only to memorize the answer”. It doesn’t work! Children who memorize the multiplication tables don’t always understand when to use them.

It is sad that for so many children and adults, math is disconnected from life and is associated only with arithmetic. Topics such as symmetry, graph theory, projections, logics are not being considered. Math teaches one to think, so it should not be reduced to arithmetic!

 

MN: You do a lot for family math: camps, playgroups, parent consults, materials… How did you start? What keeps you going?

JK: Actually, it’s not just math, but also board games, crafts, and play acting… But math is my love. It saddens me to see that many people associate math with boredom and rote memorization. I’d like to give children the joy of coming up with their own solutions, discoveries and experiments.

 

MN: Imagine someone who is just starting on a similar path, or maybe yourself when you first started. What would you recommend to that newbie?

JK: You can try things, you can create your own problems, you can change game rules on the fly. The important part is to believe that children love to find out new things; they love to learn! Children can learn not in order to get stickers or stars, but just because it is interesting to them.

MN: You said that math is your love. Unfortunately, many parents do not share your feeling.

JK: Yes, I know that many adults grew up with the idea that they do not know or love math. And oftentimes they communicate this idea to their children. I try to show parents and teachers that math is very beautiful, show my favorite math games and activities, and show that one can simply play with math. And I repeat over and over that it is not scary or shameful to not know something or to not be able to do something. We all don’t know or can’t do something, but we can learn. We can break a problem into many parts and solve each part.

 

MN: Many parents want better math experiences for their children, but do not have the opportunity to join an existing math circle. What can they do, particularly if they suffer math anxiety or fear math?

JK: If parents themselves dislike math or are afraid of it, then the least they can do is to avoid generalized statements such as “math is difficult” and “math is boring” and “I don’t understand this, so I can’t help you here”. In my article, “Math for Dessert”, I have not just games, but also specific examples of things kids might not understand and what they might need help with.

Many adults have favorite and not so favorite topics in different disciplines. It is ok. Parents may look for other adults and kids who love math and get to know them better. Or look for math camps.

 

MN: What can parents who firmly associate math with arithmetic do? Do you know of any math circles that are led not by mathematicians or math teachers or engineers or programmers, but by adults who didn’t understand math back in school, even disliked it?

JK: Well, I am not a mathematician. Even though I graduated from high school in a math program, I have a degree in linguistics. My kids solve many of the complex math problems better than I do. That’s why I like working with little kids – I am ready to understand that math is complex and ready to help them through their challenges.

 

MN: When you work with kids, particularly with very young kids, how do you know that they understand what you are telling them?

JK: I am very cautious about various tests and quizzes. I share Alexander Zvonkin’s [mathematician, math educator and an author] idea that timely questions are much more important than dictated answers and that sometimes it is better to spend a year solving a problem on one’s own than to listen to someone else’s detailed explanation.

Sometimes I give kids difficult problems, above their level, to see how they deal with these. This is not a test, but rather a diagnostic tool for the teacher, something to think about.

In general it is a complex topic, how we check child’s understanding. It requires many specific examples. It mostly depends on the ages of the kids, the level of readiness, and on the talent of the teacher.

If I have a group of preschoolers, then I usually know their skills. I might ask one of the kids to name numbers that are neighbors of the number 3, and then help and show manipulatives. I might ask another child from the same group to name neighbors of the number 19 or ask which number has 37 and 39 as its neighbors. The kids who cannot answer these questions yet, they learn by listening to the answers.

With the first-graders, if we do an activity in which we must split a shape into two congruent shapes, then I start with something very simple so everyone in the group can get the right answer. Later on, when working on more challenging problem, if kids cannot figure it out, I might offer them a simpler version with the elements of the original problem to nudge them in the right direction.

 

MN: Earlier you mentioned that emphasizing memorizing over understanding is the biggest mistake. Some parents say that memorizing first will make it easier for a child to understand why and how it works.

JK: Yes, this is a mistake made by many teachers, and many parents. I believe it is a very serious mistake. In my view, it is a fundamentally flawed approach. A child does not memorize the meaning, just the words, like a rhyme, and doesn’t understand how to use it.

We have a game called “1, 2, 3, Look!” where I use a box with several compartments. When the kids aren’t looking, I put small groups of 2 to 4 similar objects, like buttons or chestnuts, into the box. Then I show the box to one of the kids for a brief moment and the child must guess how many objects were in the box. When they see 3+1+3 objects, some kids quickly respond with 7, while others cannot answer until I show the box again long enough for them to count the objects. The fact that they memorized the words “three plus four is seven” does not help them.

MN: Some parents agree that understanding is better than rote memorization, but are worried that while working on understanding their child will fall behind academic requirements. Others believe that understanding alone is not enough and a child must have a certain level of fluency that can be reached only through rote memorization. Your opinion?

JK: Understanding is more important than rote memorization. Fluency is useful and convenient, and is reached not by rote, but by playing various games. Card games do more for fluency than flash cards.

 

MN: Many parents do not trust in their own abilities to help their kids learn. They are afraid of making irreversible errors, damaging the kids somehow. Your advice?

JK: I think every parent can find a subject or an area that brings them and their kids joy when explored together. For some it’s math. For others it’s spending time outdoors. For others yet, it’s singing or dance or board games or gardening. I believe it is more important to first find this common interest and then to show kids how you deal with complications that arise.

If parents don’t know much about math, they can frequently be of even greater help to their kids because they will think and talk through the problem slowly, without skipping steps.

 

MN: What if a child says that he hates math? What then?

JK: I would offer logic games such as Set or Ghost Blitz; math crafts, such as kusudama, symmetry games, or building with toothpicks; puzzles, such as the ones offered by Thinkfun. Then I would tell the child that this too is math. I think many children don’t know how many beautiful and interesting areas there are in math. For me, math circle is a way to show kids the richness of math problems, to teach them to think and reason instead of simply applying a suitable algorithm. It gives kids the chance to experience the joy of finding a solution.

 

MN: Would you share with our readers a favorite math activity or two?

JK: Stop-Go is one of our favorite games with younger kids. When I say “Stop-1”, the player must stand on 1 leg. “Stop-4” means 2 legs and 2 arms. There are several solutions for “Stop-3”.

We also like playing The Monsters Game. We roll a die and if it shows 5, we draw a monster with 5 heads. Next, we roll the die one more time and draw that many arms. Another roll and we draw that many legs.

MN: You have a very intense schedule – math circles, game nights, camps all around the world. And you write books! How do you stay energized, enthusiastic, and passionate? How do you deal with the burn-out?

JK: Yes, I have a full schedule, but I get help from volunteers. I enjoy coming up with ideas together, doing things together, and sharing ideas. If I get tired, I go camping or hiking. It helps me recharge.

If you have questions for Jane or would like to learn more about her circles, camps, and books, let us know!

Like It? Share It.
  • Digg
  • StumbleUpon
  • del.icio.us
  • Facebook
  • Yahoo! Buzz
  • Google Bookmarks
  • email
  • Posterous
  • RSS
  • Tumblr
Posted in A Math Circle Journey, Make

1001 Circles: an environmental geologist wants to save the world, runs a Math Club

Debbie Vane is an environmental geologist turned mentor in mathematics and science. She has developed a math club for homeschool students ages 6-14, including her son, to help them learn problem-solving strategies. In the club, everyone works on the same concept, but solves different problems.  Debbie supports mixed-age groups, because they are more representative of the real world.

Here is Debbie Vane’s interview for 1001 Circlesa series of stories that show what a math circle might be like, from the point of view of circle leaders. We hope these stories will inform and inspire you to lead a circle of your own. If you lead a math circle, an engineering club, or an informal playgroup, we would like to hear your story or interview you. Write moby@moebiusnoodles.com to talk about your adventures.


Please tell us about yourself. What are your dreams regarding students and mathematics?

From an early age, I wanted to save the world, really. After spending years as an environmental geologist cleaning up soil and groundwater, I became discouraged by the lack of commitment of big business to clean up their act. I decided the best way to facilitate change was to educate future generations. As a teacher, I instill a love of learning and stewardship of the planet by showing that everything is connected. My background as a scientist naturally led me to teach math — the language of science. Today, as a homeschooler of my son and other children, my goal is to inspire a love of learning of math, break down negative patterns from past experiences with math, and empower students to be the creators of their knowledge. I am less of a teacher and more of a mentor, assisting each student to find their innate talents and set their own learning goals.

What helped you to start the club when you decided it’s needed? What kept you going?

I had taught middle school math for a few years. The greatest impact on learning was always cooperative projects. I decided to start a Math Club for homeschoolers, using projects and simulations as the spine of the club. The enthusiasm and excitement of the kids in the club confirmed that the club was needed and enjoyed by all.

How does it feel to have a wide range of ages together? How do you adapt activities?

Prior to homeschooling, I had never experienced or taught in a multi-age class setting. Having a class with kids ranging in age from 6 to 14, I quickly saw the benefits! For example, I offered a problem-solving unit using an Interact program called MathQuest. Kids traversed MathLand in teams. They earned travel dots by solving and writing word problems. Along the way, the kids drew fate cards, which were always entertaining, and purchased supplies to help them navigate the path.

In one group, there was a 9 year old and a 13 year old. The two students approached problem solving differently. One student was visual and the other student needed to express their thought processes out loud.  The 13 year old would draw a picture of the problem, and the 9 year old would verbalize her understanding of the drawing. They worked together until they had a shared understanding and solved the problem.

A benefit of multi-age classes is that the students rarely compare themselves to others.  They recognize everyone is of a different age, so there is no sense of competition to be better than one another.  There is a general acceptance that everyone is unique, with different levels of skills. There is more cooperation in the class. A 13 year old recalls their skills and challenges when they were 9 year old. They are patient, helpful, and feel like they are a mentor to the younger student.  Sometimes, the younger child may have a better understanding and the roles are reversed. I model that all of us have strengths and weaknesses in math and that comparing ourselves to others isn’t useful for developing our understanding.  My ultimate goal is for kids to feel comfortable with their skill level wherever they are, and to believe that their worth isn’t tied to what they know but to who they are.  This is the reverse of the current competitive world.

When we were learning the problem-solving strategies, each child received different word problems to solve that were appropriate for their age and skill level. Parents always asked me if it was way too much work to create problems for each individual student. My response was always that education needs to be tailored to individual needs. While it was “extra” work for me, it was worth it because I saw growth in each individual, not only in skill level but also in confidence.

Debbie Vane Math Club

Can you share an activity from your club?

I like Marcy Cook’s tile activities. They require critical thinking, are challenging, and don’t ask kids to write to solve problems.  The students like the activities. Who doesn’t like to solve a puzzle?  The tile packet activities range from operations with numbers to geometry concepts and algebraic reasoning. Students work on a tile activity by themselves, and then ask another student to check their work and offer different solutions.  Here is my photo of a tile activity card.

What would you recommend to someone who is thinking of leading a math club or math circle for the first time?

I would recommend to start small and stay within your wheel house. Choose content that you have mastered so that you have confidence to mentor the students in all areas of the topic.

I also believe that it is so important to let the students direct the learning. Go with their interests. Find a way to bring the content into their arena, and you will have willing and eager students.

Finally, embrace and celebrate mistakes. The author Neil Gaiman said, “Make interesting mistakes, make amazing mistakes, make glorious mistakes.” If a student makes a mistake a lot of times, they equate that to not being smart or capable. We need to help students see mistakes as opportunities to learn. I intentionally make mistakes and let them correct me! I laugh when I make a mistake, and model that it doesn’t affect my confidence, my self esteem, or my desire to persevere and solve problems.

Like It? Share It.
  • Digg
  • StumbleUpon
  • del.icio.us
  • Facebook
  • Yahoo! Buzz
  • Google Bookmarks
  • email
  • Posterous
  • RSS
  • Tumblr
Posted in A Math Circle Journey, Grow

1001 Circles: Train your robot with DrTechniko

1001 Circles is a series of stories that show what a math circle might be like, from the point of view of circle leaders. We hope these stories will inform and inspire you to lead a circle of your own. And if you lead a math circle, an engineering club, or an informal playgroup, we would like to hear your story or interview you. Write moby@moebiusnoodles.com to talk about your adventures.

Today we meet DrTechniko, who wants to educate young minds about the scientific thought process, computer science and technology – and one day fill the world with young geniuses. DrTechniko’s stories and games teach kids concepts about programming, artificial intelligence, nanotechnology, computer design in the same fun and engaging way as “grandma’s storytelling time” when we were kids.

DrTechniko in real life is Nikos Michalakis. Nikos graduated from MIT with honors (TBP, HKN) with an undergrad and Masters degree in Electrical Engineering and Computer Science and a minor in Mathematics. He then did post-graduate studies at NYU’s Courant Institute. He has done research at MIT’s Media Lab and Computer Science and Artificial Intelligence laboratories and companies like Nokia and Sun Microsystems. He has published his research in prestigious conferences. He also gained practical experience on the applications of science and technology by being involved with multiple high-tech start-up companies over the years. He currently works at Knewton, an adaptive learning education technology company. He lives in Williamsburg, Brooklyn with his wife and their two sons.

Here is DrTechniko’s story, which originally appeared on his site. Adaptations for older and younger kids are added at the end.


 

Last Sunday, I taught six kids of ages 5 to 7 how to program. “In what programming language?” you may ask. Well…I didn’t use a programming language, at least none that you know of. In fact, I didn’t even use a computer. Instead, I devised a game called “How To Train Your Robot”. Before I explain how the game works, let me tell my motivation.

I learned how to program during my freshman year at MIT when I was 19. It’s not because I didn’t have a computer at home or I hadn’t heard about programming languages. It was because (a) I thought programming was boring and (b) no one had told me why I should bother. In fact, my computer teacher in high school had told me “you don’t need to waste your time learning how to program. Now we have visual tools to build programs. Programming languages are already obsolete.” That was in 1994 and he was referring to Visual Basic. Luckily for me MIT wiped all that nonsense away in a matter of weeks. But does one need to wait to go to college to get the proper education?

Learning how to program is going to be the most useful new skill we can teach our kids today. More than ever our lives depend on how smart we are when we instruct computers. They hold our personal data and they make decisions for us. They communicate for us and they are gradually becoming an extension of our brains. If we don’t learn programming as part of our childhood, we will never evolve. As the famous futurist, Ray Kurzweil, put it “The only second language you should worry about your kids learning is programming.

How To Train Your Robot

The game works as follows: every kid is turned into a “robot master” and their mom or dad becomes their “robot”. I give each kid a “Robot Language Dictionary” and explain to them that this is the language their robot understands. The dictionary has symbols for “move left leg forward”, “turn left”, “grab”, “drop” etc.

The goal is for the robots to go through an obstacle course, pick up a ball and bring it back. The kids have to write a program that will tell the robot how to do all that. Every time they write a program, they hand it to their robot and the robot executes it. To do that, I give each kid a pen and paper where they copy symbols from the dictionary to write their programs and off their robots go!

The fun part begins when each robot retrieves the ball. Now I let kids invent their own moves and symbols that they add to their dictionary and then teach their robots. There is no limit to what the kids come up with.

This is my favorite program (written by a five year old girl):

I designed the class to teach some very basic principles of computer science and programming:

Programming languages are just another way to communicate to an entity (via programs).
Programs are recipes for automating stuff.


However, I was pleasantly surprised on how much more the kids learned. On their own they figured out the following things (in a 30-min session):

  • Program Parametrization: Instead of putting a forward step ten times, they put a 10 in front of the “step” symbol (A five-year-old figure it out and asked me if she could do it).
  • Composition: Grouping of a set of moves (“move left leg forward, then move right leg forward and do this combo 10 times”)
  • Abstraction: “Run in a circle, then say “I’m dizzy!” , then call this the “Run Dizzy” program and do it 100 times. (For some reason, kids loved making their parents repeat stuff 100 times over.)
  • Unit testing: They’d write a test program to get the parents moving a few steps, have their parents run it, then fix it and run it again, and then add a few more steps until they reach the goal.

I’ve ran the class twice now and I’ve seen the same patterns, which support my belief that when kids have fun, they get very smart and creative about programming. Many of the parents plan to play the game at birthday parties. If you have questions about how to set up the game, don’t hesitate to write. You can find my contact info at www.facebook.com/drtechniko.


I was interested for a while after I designed “How To Train Your Robot” whether we can push the age limit down, so I designed a simpler game called “How To Train Your Robot To Jump.” I tried it on my son when he was 2.5, and summarized my thoughts on how we can introduce toddlers to some basic concepts.
Toddler CS
For older kids, someone (I believe in Brazil and the US) used the game as is, with more complex robot paths. The really fun part I think is after achieving the original goal of the game, the child can create their own new “moves” (essentially language constructs). Even a 7-year-old was able to come up with iterations for loops, or mix new actions.
Another way I’ve used a modified version of the game is to introduce the older kids to conditionals, such as if_else_ and while(some Boolean expression). First, invite children to write a program with fixed moves, and then vary the layout by moving obstacles. This way, the kids have to think along the lines of if(there is an obstacle)_then(turn) and then wrap those decision-making conditionals in a while(goal not reached) loop.
Essentially the program would look like this:
while (I haven’t picked the ball) {
  while (I don’t see the ball) rotate slightly left
  // now we see the ball in front of us
  // but there may be an obstacle
  move forward
  if(hit an obstacle) turn left then move forward
  // now we have cleared an obstacle so let’s try again
}
I tried it on a 6-year-old and they had difficulty understanding while loops, but they got the conditionals. I think a 9-10 year old should have no problem trying that version of the game. I ended up teaching the while(condition) concept a different way to 6-year-olds using smaller tasks. I had them read things like this:
while(nikos is wearing a hat) {
    clap your hands
}
It was fun and direct and they got it.
You can’t do CS without math, and math becomes more tangible when taught through CS. In fact, at MIT we all had to take a class in discrete math (combinatorics, induction, Boolean algebra, polynomials, probability, etc. etc.) since this is the foundation for algorithmic thinking and analysis, among other things.
Some of the things I think kids playing DrTechniko games learn that will help them understand math are:
  • Understanding abstractions and symbols and how by applying rules to them you can build a whole axiomatic system.
    This is simply done by having the kids build their own programming language and constructs on how to put things together. When a kid draws an arrow and places the number 5 in front of an arrow and assigns a meaning “jump 5 times” they are learning to build an interpret their own “algebra” or how to solve an equation using a structured mental process.
  • Counting.
    It’s ubiquitous in computing.
  • Creative Problem solving.
    It’s a big part of math that unfortunately is often put aside in favor of memorizing… All these games teach kids how to solve problems.
  • Boolean logic.
    I mentioned several examples above.
  • Min, Max, Comparisons.
    I had a class of 2nd graders figure out what is the favorite/least-favorite color of the class and they had to place their votes, then collect and partition them by color, then find the max/min. I also had them figure out how to sort themselves from tallest to shortest, by comparing their height with their neighbors.
  • Sets.
    Another game we played was to group books by color or the first letter of the title as part of a searching algorithm exercise. They learned what a set is without even realizing.
  • Probability.
    This is my favorite. We don’t teach that early enough and it’s such a big part of understanding our world and so important in modern mathematics/computer science and the “big data era”. Today’s science relies more and more on statistical models. As an exercise I had the class of 2nd graders build a computer that generates random-numbers using various designs from stuff they have at home. My favorite was a girl that put a bunch of numbers on a piece of paper and used her pen as a dart. She ‘d throw the dart and write down the closest number it hit! We also experimented with a random() function in real programs. I had them play with a program that would generate “fortune telling predictions” by randomly choosing words from a list.
Games like that are much more intuitive than giving a child a formula and asking them to reproduce.
Like It? Share It.
  • Digg
  • StumbleUpon
  • del.icio.us
  • Facebook
  • Yahoo! Buzz
  • Google Bookmarks
  • email
  • Posterous
  • RSS
  • Tumblr
Posted in A Math Circle Journey, Make