Cindy has a wonderful "Math Ideas" grouping! Math Workshop Question Posters and bookmarks.general questions to ask. for common core math standards.
Number Talks Sentence Stems / Frame Poster by Tales of a Primary Teacher
Maths explanation map - good for reasoning and Communication? Looking at fractions of numbers
Doing Well in Math Poster Chart- Singapore Math
I like this a lot, except I'd be cautious about using "good" there. I know some anxious students who would feel like they were automatically bad at math because they couldn't do all that yet. Maybe "I have mastered the math concept when.