Arrays and the Commutative Property of Multiplication. "A product is not changed at rearrangement of its factors". Tutors, set up a similar example with available manipulatives. Tutees record definition in the math journal.
Elementary math videos and songs. Try the 9 X 9 song to get a hint of how good these are. His whole site is great for every classroom. Teachers MUST use more music and teaching videos to make the quality of their lessons better. CW
Another pinner said: I add each cat chased 8 mice (ounces). I know it doesn't start with O, but they are small and so are ounces. Plus the kids always think it is so funny that the kingdom/castle becomes infested with mice!---I teach the Big G, but I like the story that goes with it...might help some kiddos!
Associative Property. You can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis'. In other words, if you are adding or multiplying it does not matter where you put the parenthesis.