Clipart by: www.mycutegraphics.comBuild your students understanding of addition and subtraction strategies through the use of this SmartBoard Unit (also available as a PowerPoint in my store). A good foundation of number sense can be attained through the mathematical concepts included in this unit. Workbooks can be made for each student by exporting this file as a PDF. I put two slides on each page and copy the books back to back. As I am teaching, the students follow along and EVERYONE ge