I have these posters hanging at a very focal point of the classroom and refer to them often, especially during a math lesson. Before moving forward I will stop and ask the students to show me a number of how well they understand the lesson so far. I will either then re-explain or move on. This works great for a quick check on student understanding.
The four levels include "I am a novice," "I am an apprentice," "I am a practitioner," and "I am an expert."
Included are two versions- chalkboard and plain white background. You choose which works best for your printing!