I created https://10f.io https://10f.io It's a tool for elementary school teachers to create ten-frames, a common way to visualize the base-ten system in K-2 m

I created https://10f.io https://10f.io It's a tool for elementary school teachers to create ten-frames, a common way to visualize the base-ten system in K-2 math curriculums. I want to make it simple for teachers to create their own resources.