Counting in sets of ten is a skill that we develop and internalize at a very young age. However, surprisingly, there are dozens of different counting systems, many still in use today. Understanding and exploring other counting systems can be helpful to children.
Phil Daro explains that the main cause behind the United States’ lagging academic performance, particularly in math education, is not the students, the teachers, or the schools, but rather the curriculum, specifically in its attempt to cover too much material.
In this video, two teachers use Ellen Stoll Walsh’s “Mouse Count” to illustrate the concept of “less and more.”
The Biggest Pumpkin Ever by Steven Kroll and A Pig is Big by Douglas Florian are two children’s story books that present opportunities for children to explore the mathematical concept of measurement, particularly the Big Idea that all measurement involves a “fair” comparison.