For math contest enthusiasts, if you are preparing for MATHCOUNTS or other middle school and high school math contests, then the MATHCOUNTS Trainer App is a good app that you can try. The app contains thousand of problems from previous School, Chapters, and National Mathcounts. Note that all problems in this app have full solutions. For […]

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# Teaching Tools

## Lesson Study Book 2: Learning More Together

Two years ago, our institute, the University of the Philippines National Institute for Science and Mathematics Education Development (UP NISMED) published Lesson Study Book 1 which details our involvement in Lesson Study in the Philippines. Last year, when I was in Japan, we also published the sequel of this book titled “Lesson Study Book 2: Learning More Together, Growing […]

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## How to Calculate Using Japanese Abacus Part 2

October last year, I have introduced how to represent numbers using the Japanese abacus. In this post, I am going to teach you how to add and subtract using it. If you are not familiar on how to represent numbers in abacus, please read the first part of this series by clicking the link above. […]

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