SUPERB! Place the numbers on the number line. Loads of levels. Negative numbers and decimals. Play against the clock for a score. My class's favourite warm up, useful throughout school from year 3 to year 6.
Grade 4 curriculum material on Curriki. There are three units: (1) Number, Number Sense and Operations (2) Measurement (3) Patterns, Functions and Algebra
This is a short video of a teacher doing a rap about how to turn improper fractions into mixed numbers and how to turn fractions into percentages. It's rad!
Elementary: Addition, subtraction, multiplication, order numbers, dogs counting, money games, math puzzles
Middle School: estimation by rounding, order of operations, order integers, circle graphs, predictions, line graphs, patterns, percent estimation, money, fractions
This website has already done power points for different math topics. These are very cool I watched a couple of them. There are games on for each topic for the kids to practice. There are also a list of rescources that you can click on and go out to other sites.