This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Materials For each pair: * 2 ten-sided dice with the numbers 0 to 9 or two spinners with the numbers 0 to 9 * Base-10 blocks, linking cubes, or bundled...

This problem provides an opportunity for children to practice skip-counting and counting on. It lays a foundation for the concept of multiples and proportional thinking. Using linking cubes of two different colors, one color grouped in 2s and the other color grouped in 3s, children look for ways they can make a line of one color equal to a line of the other color. The Teachers' Notes page offers suggestions for implementation, discussion questions, and ideas for extension and support.

This lesson will allow students to explore building numbers 10-19 with tens and ones on a virtual math manipulative website, then paste their models in a Google Slides assignment. Image credit: Britta Nunley, created using a template in Canva

On this nearpod students can review Standard 1.NBT.2 Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: