Simple sheet that can be worked through with a pupil to help identify their strengths and the things they enjoy or feel good about. This can then be shared among staff or displayed on their workstation. Plain design with room to personalise with a self portrait.
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.
Classroom Memes - use to decorate your room or in a class rules and procedures presentation. Includes the images AND an editable PPT file, so you can customize the posters. https://www.teacherspayteachers.com/Product/Teacher-Memes-Posters-Editable-Back-to-School-Class-Rules-1330648
Middle School Math Classroom Decor Alphabet - Math Posters