According to the Common Core Standards, 3rd grade math resources should focus on four critical areas: (1) developing understanding of multiplication and division and strategies for multiplication and division within 100; (2) developing understanding of fractions, especially unit fractions (fractions with numerator 1); (3) developing understanding of the structure of rectangular arrays and of area; and (4) describing and analyzing two-dimensional shapes.
If you know a particular Common Core Domain that you'd like to practice, you can drill down to it here.
(Click on a resource to see our full catalog)
Work through a practice problem on the associate law (2:15)
Work through a problem with Sal on the commutative law of multiplication (1:48)
