I recently saw this idea and thought it was really cool! At the beginning of the year, students make a poster introducing themselves using numbers! Shoot, you could do this activity at any point in the year, not just the start of the year. For example they might use shoe size, weight, height, number of siblings, birthday, class number, number of pets they’ve owned, etc. Here comes the challenge (for upper grades): then students use sticky tabs to cover the actual numbers (written in standard form) and instead write an equation. See the examples below:

Then display the posters and see if kids can figure out who is who. This is especially fun if kids have completed the poster as a homework assignment (so kids don’t see them making it). Either way, it’s a great way to build number sense and reinforce the idea that a number can be written many, many ways. Enjoy!