For teachers (or parents… or students)
I made these last year as an attempt to help my students improve their number sense.
Directions: Print these out double-sided, cut out the cards, then follow the instructions on the handout.
Despite the directions being on top, I usually have to model the process for my students first. I’ll watch the student attempt it or check on them to see which cards they have trouble with, which has helped me diagnose what skills they lack (which are sometimes surprising for a high school level, but this allows me to address it now instead of never).
I welcome any feedback on how the instructions and activity can be improved.