September is here, and so is the school year for my US friends. Start a habit of doing some problem solving in your math classes this year! Here is the 1990 Calendar of Problems from 35 years ago f…| Reflections and Tangents
Wow the summer is flying by, and it is back-to-school time already in many parts of the US. If you’re about to start your academic year, here is the August 2010 Calendar of Problems from 15 y…| Reflections and Tangents
These sorting by addition up to 10 mats activity is a great tool in your toolbox to help students with math fact fluency. Download and add this to your kindergarten summer lesson plan today! Read the full post: Summer Sorting By Addition Facts to 10 Mats| Kool Kids Games
Using stories is an excellent way of introducing mathematical word problems for kindergarten, as they help students make sense of why anyone would care how many kites or flowers there are. These addition and subtraction worksheets for kindergarten are a great year round resource and the sheer variety of problems within 10 means there’s lots of opportunity to practice. Read the full post: Telling Fun Stories With Word Problems For Kindergarten| Kool Kids Games
Spring is here, and I’m sharing the May Calendar for some problem solving enjoyment in the last stretch of your school year. This is the May 2019 Calendar of Problems from 6 years ago for you…| Reflections and Tangents
Last week, I was the guest questioner for Howie Hua’s Mental Math Monday prompt that he posts on his social media accounts1. I asked, “How would you calculate 15 x 22?” and plenty of folks shared t…| Reflections and Tangents
Welcome to April, and I hope you’re ready to spring into some problem solving! Here is the April 2011 Calendar of Problems from 14 years ago for you and your students to try. I have the last …| Reflections and Tangents
This is the fourth article in a series on Cryptography for the Everyday Developer. Follow along to learn the basics of modern cryptography and encryption. Modular arithmetic is the foundation for asymmetric cryptography like RSA, elliptic curves, or Diffie-Hellman — all of them rely on the properties of modular arithmetic to guarantee security and secrecy. Since modular arithmetic is so important to cryptography, it pays to understand how it works. This post will help us along the journey b...| Kevin Sookocheff
Welcome to 2024! As we start the new year, I’ve come across four math-y fun facts about the number 2024. Read on for more… Difference of Two Squares The number 2024 can be calculated by subtr…| Reflections and Tangents
Last weekend, I shared my thoughts about teaching fractions with teachers of grades 3-5 at the Asilomar meeting of the California Math Council. After decades of work in high school, and hundreds of…| Henri's Math Education Blog
At some point, maybe thirty years ago, it became fashionable to emphasize functions and their multiple representations in secondary school math. This was in part driven by the newly available elect…| Henri's Math Education Blog
Using stories is an excellent way of introducing mathematical word problems for kindergarten, as they help students make sense of why anyone would care how many kites or flowers there are. These addition and subtraction worksheets for kindergarten are a great year round resource and the sheer variety of problems within 10 means there’s lots of opportunity to practice.| Kool Kids Games