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. […]

# Category: BlogPosts

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 […]

A two-person game/Un juego de dos personas Materials/Materiales A game board/El tablero del juego 2 pieces of one color/2 piezas de un color 2 pieces of another color/2 piezas de otro color DIRECTIONS One player takes 2 pieces of one color. The other player takes 2 pieces of a different color. Un jugador toma 2 […]

Original Version found at https://nrich.maths.org/13125 Materials/Materiales A five-by-five dotty grid paper. Un papel cuadriculado con puntos en forma de 5 por 5 Marker pieces of two different types/colors. (two colors of rocks, pennies and dimes, etc.) Piezas de dos tipos/colores (eje. piedras de dos colores, monedas distintas, etc.) Directions/Instrucciones This is a two-person game. […]

Object of the Game: Be the first to get four of your chips in a vertical, horizontal, or diagonal line. Directions: • To begin, the first player places both red markers at the bottom of the gameboard to get them into play. She puts her chip on the resulting product. ◦ For example, if […]

One of the many challenges with remote instruction is finding a way for teachers to see the mathematical thinking of their students. A common workaround is for students to do their work on paper and then upload a photo of it. Unfortunately, this often results in a lousy picture in which the math is illegible. […]

A colleague wanted support from me in finding a method for doing a daily Entrance Ticket (basically a warm-up problem) that is easy to do. She said the method had to be easy to do, otherwise it is not sustainable and wouldn’t become part of her teaching DNA. We settled on using Desmos, since she […]

Number Talks are an incredibly important routine for helping students develop the conceptual and procedural fluency they need. How might we do Number Talks during remote instruction? I’ve seen teachers create a lot of great solutions that range from high-tech to very low-tech or even NO tech! A common no/low tech solution is to simply […]