This is the third part of a series of posts showing how to visually represent the four operations of whole numbers using the CHIP MODEL. The first part shows how to model addition and subtraction. The second part demonstrates multiplication with the chip model. There are two ways to think of division: partitive and quotitive. […]

This is the second part of a series of posts showing how to visually represent the four operations of whole numbers using the CHIP MODEL. The view the first part in which we show how to model addition and subtraction, go here. Just as the chip model is a particularly effective way in visually […]

About 32 years ago I had just completed my B.S. in Mathematics and was immediately hired to teach mathematics at Roosevelt Junior High School in Oakland, California. I thought I knew everything there was to know about K-12 math concepts. Most certainly, adding and subtracting whole numbers! However, I was almost immediately humbled by a […]

Here is a version of Hex that you can play remotely with Google Slides. DIRECTIONS/INSTRUCCIONES The game is played by two players. Each player chooses one color marker. Se juega con dos jugadores. Cada jugador escoge una pieza de un color. Begin with an empty board. On each turn, one player puts a single marker […]