This site has a wonderful review of fractions. Scroll down to the yellow box to find the topic(s) you need to practice. When you click on a topic, you will see a green box with explanation, and then a blue box with practice problems.

This site also gives practice adding and subtracting fractions, multiplying, and dividing fractions.

For a challenge to your brain, try these tangram puzzles.

Please leave me a comment to let me know what you found to be helpful.