I use a Sign In Board every day in my classroom to build students' math skills, to introduce new math concepts, to review previous year's concepts for my low students, and to differentiate for my high students. It takes about 5 minutes each day, and is a powerful tool that can be used in any grade!
This file is ideas on how I use the sign in board to go over 3rd grade common core standards. However, it can be adapted to meet the needs of your classroom. I originally saw it done in kindergarten!
For more information on how I use it in my classroom, please check out this post on my blog.