Children will grasp and recall basic facts quickly with this outstanding program, plus learn strategies to ensure lasting mastery. Strategies include counting on, counting back, zeros, doubles, doubles plus one, parts of ten, tens, and extras. Includes both oral and written practice. Plus strategies for problems beyond basic facts: decade numbers (10, 20, etc.) and mental math to solve 2-digit facts (20 + 3, 30 + 53, etc.). Each book covers 96 downloadable pages.