Comprehensive lesson in number representation using Base 10 Blocks for primary students. Practice includes numbers less than 100 (one and two digit numbers only) using units (ones) and longs (tens). Students will manipulate blocks representing numbers. Level of difficulty increases throughout the lesson ending with adding on Base 10 blocks to find a new number. Monster theme showing students that using Base 10 blocks is not scary! This could easily be broken down into multiple mini lessons. Great for small group or large group. Slides are all linked for easy use. MUST have SMART Notebook software to download and use this lesson.