MULTIPLICATION
Online flashcards. http://multiplication.com/interactive/flashfun/flash/index.html
Practice multiplication. http://www.playkidsgames.com/games/apples/default.htm
Use a calculator to practice multiplication facts. http://www.playkidsgames.com/games/robot/default.htm#
This game is a challenge against the clock. http://oswego.org/ocsd-web/games/mathmagician/cathymath.html
Create the multiplication problems. http://www.oswego.org/ocsd-web/games/SumSense/summulti.html
Matching game. http://quizhub.com/quiz/f-multiplication.cfm
Multiplication table for quick practice of all the facts. http://www.multiplication.com/cmptrgames/quickpractice.htm
Practice multiplication facts in TV show game format. http://www.mathsisfun.com/games/mathionaire-multiplication-quiz.html
More challenging. http://www.prongo.com/farm/game.html
FRACTIONS
Action Fraction racing game. http://funschool.kaboose.com/formula-fusion/number-fun/games/game_action_fraction.html
Fraction games. http://www.visualfractions.com/Games.htm
AREA & PERIMETER
Find area and perimeter of rectangles. http://www.mathplayground.com/area_perimeter.html
Learn about area and perimeter. http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/perimeter_and_area/index.html
*NEW*
First in Math http://www.firstinmath.com