This is a great activity for working with arrays. This SmartBoard lesson allows students to work out and move arrays for different numbers. This hands on lesson lets students take different numbers - or you can prearrange the numbers so that you can differentiate based on student ability/need - and make arrays on grid paper and cut them out and paste them on construction paper to see the different ways to make arrays for different numbers. Some numbers may only have one array (e.g. 7) but a number like 12 may have many.
NOTE: PLEASE DOWNLOAD NUMBER CARDS TO GO WITH THIS LESSON (FREE) AND THE GRID PAPER (FREE).