Description: A collection of strategies (with examples and handouts) for helping students with learning and attention issues to understand the base-ten system. Below are five evidence-based practices you can use when teaching students about place value and its importance in the base 10 system. Explicitly teach how to compose a number (create a multi-digit number from its components by place, such as ones, tens, and hundreds). Put the straws on the place value mat to show 1 hundred (10 bundles of 10), 4 tens (4 bundles of 10), and 2 ones.*Teacher Advisor is 100% free.