Addition and subtraction strategies, some resources:

• Direct modeling overview
• Direct modeling for JRU and SRU
• Direct modeling for JCU and CDU
• counting on
• counting back
• counting up to subtract
• short overview of counting strategies (including a fourth strategy we didn't discuss in this class)
• basic fact strategies ( use doubles, use 10 to add, add up using 10 to subtract)
• about teaching 2-digit strategies
• specific 2-digit strategies