Wild About Math! Making Math fun and accessible

11Nov/07261

Impress your friends with mental Math tricks

See Math tricks on video at the Wild About Math! mathcasts page.

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Being able to perform arithmetic quickly and mentally can greatly boost your self-esteem, especially if you don't consider yourself to be very good at Math. And, getting comfortable with arithmetic might just motivate you to dive deeper into other things mathematical.

This article presents nine ideas that will hopefully get you to look at arithmetic as a game, one in which you can see patterns among numbers and pick then apply the right trick to quickly doing the calculation.

The tricks in this article all involve multiplication.

Don't be discouraged if the tricks seem difficult at first. Learn one trick at a time. Read the description, explanation, and examples several times for each technique you're learning. Then make up some of your own examples and practice the technique.

As you learn and practice the tricks make sure you check your results by doing multiplication the way you're used to, until the tricks start to become second nature. Checking your results is critically important: the last thing you want to do is learn the tricks incorrectly.

10Nov/070

Good storytelling ability related to good mathematical skills

Science News Online just published a fascinating article: Good Stories, Good Math. The article is subtitled: "Preschoolers who can tell good stories develop good mathematical skills by the first grade." Writer Julie Rehmeyer reports on a new study which reveals that there's apparently a very strong connection between mathematical ability and the ability to tell stories from different perspectives.

The researchers found that 3- and 4-year old preschoolers who were able to tell stories and switch perspectives while doing so performed better in mathematics 2 years later. An example of switching perspectives is this comment from a child:

"The waiter was mad when the frog jumped in the soup."

The child was managing multiple relationships, simultaneously keeping track of how the waiter was feeling and of what the frog was doing.

While I had never considered such a relationship, it makes sense to me. Mathematics is all about managing relationships between "things." It's about being able to think abstractly. Storytelling shares these characteristics, even though the storytelling abstractions are about people and what they might be thinking and feeling, and not mathematical abstractions.

An interesting refinement that the researchers made was one that allowed them to make a distinction between mathematical skill and skill in arithmetic. They are not the same skill and many people who are mathematically gifted perform arithmetic poorly.

The study is based on the work of Stanford University mathematician Keith Devlin. Rehmeyer explains that in Devlin's book The Math Gene, he argues:

"...that language arose when humans acquired the ability to visualize complex relationships among different objects when the objects themselves are not in view. The ability to do mathematics arises from that same ability to manipulate abstractions."

The implications of this study are huge. Can students be taught abstract thinking skills early in life through storytelling and improve their future mathematical ability?

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9Nov/0714

How to get past “stupid” Math mistakes

I was recently asked how I deal with silly mistakes many of us make in algebra or arithmetic, especially in the context of a tutoring session. Common errors include forgetting to carry numbers when adding, getting confused about operating with plus and minus signs in one problem, and multiplying two digits incorrectly.

I consulted Michael Sheppard, director and lead educator for Big Sky Learning Center in Santa Fe. Michael shared a number of suggestions based on his 19 years of experience teaching kids in one-on-one and group settings. I've combined Michael's excellent suggestions with some of my own:

8Nov/073

A textbook for those who don’t think they like Math

Mathematics: A Human Endeavor, by Harold Jacobs, Mathematics: A Human Endeavoris a great book high school students will enjoy using to explore a number of concepts. Its subtitle is quite apt: "A Textbook for Those Who Think They Don't Like the Subject." I have the 1970 edition which is much less expensive than the one linked to here. A variety of editions are available but I have no idea how newer ones are different from the one I have.

The book has 10 chapters:

  1. The Mathematical Way of Thinking
  2. Number Sequences
  3. Functions and their Graphs
  4. Large Numbers and Logarithms
  5. Regular Polygons
  6. Mathematical Curves
  7. Some Methods of Counting
  8. The Mathematics of Chance
  9. An Introduction to Statistics
  10. Some Topics in Topology

Each chapter contains a number of lessons, each of which is rich with interesting exploration problems. As an example, chapter 1 has 6 lessons with delightful investigations:

  1. The mathematics behind the path of a billiard ball on a frictionless table. Students are guided to use graph paper to create "tables" of different dimensions and to track the ball's path on each of these. Stimulating questions lead the student to think about fractions, and relative primeness of numbers.
  2. Optical illusions.
  3. A nice area paradox based on the Fibonacci sequence, in which a rectangle is dissected in such a way that when the pieces are reassembled into a square the square appears to have a smaller area than the rectangle.
  4. Dissection and coloring explorations with 3-dimensional figures.
  5. Number tricks and the algebra behind them.

Other chapters are equally rich with interesting guided explorations. The book also contains many drawings, illustrations, and cartoons.

I highly recommend Mathematics: A Human Endeavor to all students and adults alike who want to explore a number of interesting and not too difficult problems with a very enthusiastic guide who makes the exploration fun. All it takes is a little curiosity and this book can take you a long way.

Filed under: Book Review 3 Comments
8Nov/070

“Math Girl” rocks

Surfing Youtube looking for entertaining Math videos I ran into the "Math Girl" series. They're absolutely hilarious. Even if you're not a Math geek you should enjoy these videos. There are two episodes so far, and a preview of a third.

From Wikipedia:

Math Girl is an animated movie superhero co-created by Lou Crockett, an artist, animator, and designer; Jesai Jayhmes, an actor and director; and Veselin Jungić, a working mathematician. The character made her first appearance in Differentials Attract (2004). In her civilian clothes Math Girl is an ordinary student, a smart girl that wears glasses. When she takes her superpower alter ego, thanks to her superb understanding of mathematics, Math Girl becomes a super heroine. Math Girl operates in Calculopolis, assisted by her sidekick Pat Thagoras a young man who admires Math Girl, and professorial Big Math, the mayor of Calculopolis. She fights a villain named Zero!, an evil character whose goal is to rule Calculopolis by exploiting people’s ignorance of mathematics.

Check out the videos at the Math Girl page for the mathematician who co-created the series, Dr. Veselin Jungic.

Filed under: Humor No Comments
7Nov/071

EFT clears Math phobia

EFT is short for "Emotional Freedom Technique". It is a simple-to-apply technique that can clear long-standing emotional issues, including Math anxiety (phobia). EFT is an energy medicine technique related to acupuncture without the needles. EFT was founded by Gary Craig and you can download enough information to learn and practice EFT for free at Gary Craig's web-site, http://www.emofree.com. EFT is endorsed by Deepak Chopra, Candace Pert (author of Molecules of Emotion), and other leaders of the complementary healing movement.

If you're someone who doesn't believe in the value of anything outside of mainstream western medicine I invite you to have an open mind and to explore EFT. It is free to learn, safe and gentle to use, and has helped a large number of people. I personally don't experience Math phobia very much but I have used EFT for treating other emotional issues and have experienced positive results. Plus, I personally know of others who have benefited from EFT as well.

What is EFT? Gary Craig describes it in his newcomer page:

EFT is based on a new discovery that has provided thousands with relief from pain, diseases and emotional issues. Simply stated, it is an emotional version of acupuncture except needles aren't necessary. Instead, you stimulate well established energy meridian points on your body by tapping on them with your fingertips. The process is easy to memorize and is portable so you can do it anywhere. It launches off the EFT Discovery Statement which says...

"The cause of all negative emotions is a disruption in the body's energy system."

And because our physical pains and diseases are so obviously connected with our emotions the following statement has also proven to be true...

"Our unresolved negative emotions are major contributors to most physical pains and diseases."

Practicing EFT mainly involves lightly tapping or massaging meridian points on your head and upper body while focusing on a stressful emotion. The are several other components of EFT as well. You can learn the whole procedure, which takes just a few minutes to apply, from the free EFT manual and other resources at Gary Craig's web-site. You can easily teach a child to use EFT for themselves in stressful situations.

6Nov/075

How kinesthetic folks learn Math

I'm not a Math teacher yet I feel I'm highly qualified to write on this topic. I am a lifelong Math learner and I am highly kinesthetic. Being kinesthetic means I am highly sensitive, I love to touch things, I enjoy moving my body, and I am aware of my feelings. In some ways I learn Math (and most everything else) differently than most teachers teach. This article shares six ways I engage my kinesthetic intelligence in learning Math and solving problems.

1. Being Hands On

This is perhaps the most obvious way us kinesthetic folks learn. If I'm solving a problem I have to make a picture. Part of drawing is about engaging the visual senses but a big part is about using my hands, touching the pen, and moving it along the paper. While I haven't gotten myself organized to gather together pens and pencils of different textures and colors and paper of different thicknesses and colors I'm sure these things would be helpful to myself and to others.

I also enjoy making paper models of mathematical things, cubes, Moebius strips, and other "manipulatives".

If someone describes a problem to me, or if I read it in a book or online I have to record it on paper, to make the problem mine and to fully engage with it.

As a side note, a huge part of my enjoyment of blogging is the kinesthetic pleasure I derive from typing on the keyboard. Really.

2. Moving and Pacing

I don't sit still. Learning involves movement. Often when I'm solving a challenging problem I'll be walking around the house, holding the picture I just drew, and pondering the solution. My body is just too restless to be still. Somehow my entire neurological systems seems to get engaged when I'm in motion and my creative thinking becomes enhanced. If I'm sitting down my legs will move, or sometimes I'll tap with my feet. And, I'll be tuned into the sounds and sensations around me.

3. Music and rhythm

Music doesn't only affect the aural senses. It also stimulates the kinesthetic senses. If you don't believe that, ask yourself if you've ever been moved by a piece of music, maybe even been moved to tears. I have.

I find it very helpful to have either music playing or white noise, like the hum of a computer monitor, when I'm thinking creatively. Think "The Mozart Effect", which is all about the positive effects of classical music on learning.

Some people learn by getting in sync with a rhythm. I have no doubt that some kids would learn to count much more quickly and easily if they counted while skipping rope, or while hopping, or maybe as they drummed or performed some other rhythmic activity.

I've even heard of kids who couldn't learn to read until they incorporated singing into the approach. Wow!

6Nov/070

97th Carnival of Homeschooling announced

Early this morning the 97th Carnival of Homeschooling was released. Blog carnivals are virtual events where one blogger serves as editor for relevant submissions and publishes links and descriptions to the posts. Carnivals often have a fun theme and serve to showcase articles from a number of members of related blogs.

I was delighted to have an article of mine, 11 tips for building a strong Math foundation for kids, accepted and I was equally delighted to see a number of other Math-related blog articles:

Check it out!

Filed under: Blog Carnival No Comments
5Nov/070

Review: What SUCCESSFUL Math Teachers Do, Grades 6-12

Alfred Posamentier, one of my great heroes, and Daniel Jaye have collaborated to produce a discussion of "79 Research-based Strategies for the Standards-based Classroom", which is the subtitle of the book, What SUCCESSFUL Math Teachers Do, Grades 6-12.What SUCCESSFUL Math Teachers Do, Grades 6-12

Posamentier is dean of the School of Education and Professor of Mathematics Education of the City College of the City University of New York. He has written a number of books that inspire teachers and students to approach Math with a sense of wonder. Jaye is the assistant Principal for Mathematics at Stuyvesant High School, a school for gifted students in New York City.

The book has 6 chapters:

  1. Managing Your Classroom
  2. Enhancing Teaching Techniques
  3. Facilitating Student Learning
  4. Assessing Student Progress
  5. Teaching Problem Solving
  6. Considering Social Aspects in Teaching Mathematics

Additionally, there's a resource section where the authors list over 100 topics for classroom exploration.

Each chapter consists of a number of teaching strategies. Each strategy is methodically broken down into:

  1. Title of the Strategy
  2. What the Research Says. This section refers to and describes specific studies that support the strategy being discussed.
  3. Teaching to the NCTM (National Council of Teachers of Mathematics) Standards. This is an important section in that it explains how employing a particular strategy meets one or more specific principles or standards of the NCTM.
  4. Classroom Applications. This section explains and lists ways to implement the strategy in the classroom.
  5. Precautions and Pitfalls. This section alerts teachers about potential obstacles to realizing the goal of the strategy plus recommends ways to avoid these traps.
  6. Sources. These are the references to the research behind the strategies.

The book is comprehensive, well organized, and thoroughly researched. Although I'm not a teacher or student these strategies all seem very valuable to me.

Some of my favorite strategies include:

  1. Strategy 16: Find out about your students' motivation regarding mathematics, and use that knowledge to refine your instruction.
  2. Strategy 19. Praise mistakes! This strategy addresses the shame and anxiety that many students feel in the classroom.
  3. Strategy 33: To reduce math anxiety, focus on both the thoughts and the emotions of the students.
  4. Strategy 63: Emphasize the general principles that underly solving specific types of problems.
  5. Strategy 69: Find out about your students' families and how their values and practices might affect students' attitudes and performance in mathematics.

Posamentier and Jaye clearly know what they're talking about, both having spent considerable amounts of time in the trenches and both caring very deeply for the success of their students. Their competence shows in the tying together of strategy, research, and application in support of NCTM guidelines. Their caring shows in the overall tone of the book.

I highly recommend this book to all teachers, coaches, and tutors. As a Math tutor and mentor I found a number of important considerations to incorporate in my work with students.

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4Nov/0759

How to square large numbers quickly (part 1)

I have to confess, one of my secret addictions is scouring Math books for novel approaches to solving old problems. I especially like to look for these fresh approaches in, ironically enough, old books.

Last night I was perusing a little book: "The Master System of Short Method Arithmetic and Mechanical Calculations Simplified: Methods Used by the World's Foremost Experts" by Paul Huberich. The book was published in 1924. Page 34 has this very novel algorithm for squaring (multiplying by themselves) large numbers. In this "how to" article I describe this algorithm (in more detail than the terse explanation provided in the book, I should add) and I give a number of examples of how to apply it. I also provide suggestions on how to do the arithmetic efficiently.