This tool is designed to help plan a Choral Counting lesson. Pick a starting value and increment, and choose the shape. Use the Reset grid button to transfer changes to the grid.
The tool lets you look for the patterns your students might see and plan where to pause during the lesson.
Find out more about Choral Counting in Tracey Zager's book Becoming the Math Teacher You Wish You'd Had. See the resources for Chapter 10. Teacher Education by Design have some Choral Counting Resources. This video is a good example of how it works.