You might find some of these helpful.
Ratio Practice:
Ratio Game
http://www.softschools.com/math/ratios/ratio_game/
Ratio Blaster
http://www.mathplayground.com/ASB_RatioBlaster.html
Ratio Stadium
http://www.mathplayground.com/ASB_RatioStadium.html
Ratio Quiz
http://www.softschools.com/quizzes/math/ratio_word_problems/quiz1309.html
Unit Rate Practice:
Unit Rate and price comparison
http://www.quia.com/cb/195515.html
Khan Academy Lots of video tutorials on many math topics
NCTM Factor Game: http://illuminations.nctm.org/ActivityDetail.aspx?ID=12
NCTM Product Game: http://illuminations.nctm.org/ActivityDetail.aspx?ID=29
http://www.multiplication.com/interactive_games.htm (These games are played over the Internet. They load fast and are FUN to play. Flash Fun, Multiplication Jeopardy, and more.)
http://www.prongo.com/farm/index.html (Come on over to the farm stand to practice your multiplication and addition. Multiply the amount of apples or eggs by their price, then add them together for your total.)
http://www.aplusmath.com/games/matho/MultMatho.html (Multiplication Matho - a game where you are given a multiplication problem and you need to click the answer on a grid. The object of the game is to get 5 in a row.)
http://library.thinkquest.org/3896/index2.htm (You know how to do addition. The next step is to learn how to multiply. These pages will help you practice and learn your multiplication facts from 1 to 4. These pages use bricks to show arrays, and include 16 practice problems).
http://www.dositey.com/addsub/memorymult.html (Concentration Game)
http://www.dositey.com/addsub/Mystery6.htm#s (Multiplication Mystery Picture)
http://www.dositey.com/addsub/mystery1M.htm (Solve a fact problem and click on the answer on the grid to reveal a Mystery Picture.)
http://www.ezschool.com/Games/Math.html (Alien Multiplication -Read the given number sentence. Multiply the numbers. Click the answer before the enemy lands in our territory.)
http://www.bbc.co.uk/education/mathsfile/shockwave/games/gridgame.html (Grid Game - Find the factors, multiples, powers, prime, and triangular numbers from the selection shown on the grid and see Pythagoras and Hypatia jump for joy!)
http://www.harcourtschool.com/activity/mult/mult.html (Multiplication Mystery - Match the products to the multiplication table to reveal a hidden picture.)
http://www.quia.com/custom/6gate.html (Find the matching squares)
http://www.geocities.com/multiplicationfacts/ (For each problem, find the correct answer and click on it. If you are correct, you will see the next problem. If you are wrong, nothing will happen, try another answer.)
http://quizhub.com/quiz/f-multiplication.cfm (Quiz Hub - Click on the matching pairs.)
http://www.programmingart.com/free/games/multiply/ (Timed multiplication practice that keeps your score)
http://www.lizardpoint.com/math/mult-online.html (Practice facts)
http://www.playkidsgames.com/mathGames.htm (Numerous games to practice facts)
http://www.mathgym.com.au/htdocs/japplets/invaders/invaders.htm (Play Space Invaders)
http://www.prongo.com/math/multiplication.html (Batter’s Up Baseball - Choose a Single to practice facts)
http://www.funbrain.com/football/index.html (Football Game practicing multiplication facts)
NOTE: Some sites may not work in IExplorer but do work in Mozilla.