Third grade for us (in addition to the multiplication and division facts -- and yes, you'll want those memorized and fluent, even if it's just to keep the school from having an "excuse" for not moving her forward if they're looking for one)...
1) Addition with carrying and subtraction with borrowing
2) Starting some equivalent fractions
3) Decimal place value (square divided into 100 boxes...shade in 0.34 of the box)
4) Comparing decimals (less than...greater than)
5) Perimeter
6) Multiplication of factors of ten by a single-digit number (200 x 7 or 80 x 8)
7) Comparing "easy" fractions
8) Elapsed time (frequently shows up on grade-level standardized tests)
9) Range...median...mode...maximum...minimum
10) Concept of area (not having to calculate it with side lengths, but seeing a shape on a grid of square centimeters and being able to count the squares to state the "area")
11) Lines of symmetry
