This is a great printable activity to use at the beginning of the school year as a "get-to-know-you" activity. I love that it integrates math, works for a wide range of grade levels, and is fun and engaging for students. This printable should be used with 2"x 2" post-its.
Newell's Nook features this colorful poster with the acronym MATH: Mistakes Allow Thinking to Happen. It is a tool for teachers who teach growth mindset in their classrooms and support students in seeing the power of mistakes in the learning process. It's a reminder that all mathematical thinking is valuable and can help us learn!
I like this saying because it encourages that mistakes are ok to make. I expect my students to show effort in the work that they do, and mistakes are fixable and acceptable as long as they keep trying. I would put this saying on a poster (on vinyl sticker like the one here) and keep in my classroom to remind students that it is ok to make mistakes.