This would be a great center activity for math while teacher is doing small group instruction! It takes multiplication from just recalling facts to a deeper level of understanding. LOVE! Multiplication of the Day for 3rd Grade!
Tales from Outside the Classroom: 3rd Grade Common Core Math Warm Ups
This is a poster dealing with place value. I would use this in my classroom to hang in the classroom so children could refer back to it while working on expanded form and place value.