General Topics:
Greg Tang: http://gregtangmath.com/games
IXL Review of all Standards: http://www.ixl.com/math/grade-5
Illuminations—Created by the National Council of Teachers of Mathematics: http://illuminations.nctm.org/
Operations and Algebraic Thinking:
Addition and Subtraction Word Problems-Thinking Blocks: http://www.mathplayground.com/tb_addition/thinking_blocks_addition_subtraction.html
Multiplication and Division Word Problems-Thinking Blocks: http://www.mathplayground.com/tb_multiplication/thinking_blocks_multiplication_division.html
Word Problem Generator: http://gregtangmath.com/materials
Number and Operations in Base Ten:
Pick a Path: http://illuminations.nctm.org/pickapath/
Deep Sea Duel: http://illuminations.nctm.org/DeepSeaDuel/
Ken Ken: http://illuminations.nctm.org/Activity.aspx?id=4184
The Arithmetic Game: http://www.primarygames.com/math/arithmeticgame/
Factorization Game: http://mrnussbaum.com/forest
Addition and Subtraction: http://www.cdsearch.britannica.com/lm/games/GM_3_9/GM_3_9.htm
Place Value with Decimals: http://mrnussbaum.com/placevaluepirates/
Sum Sense Division: http://www.oswego.org/ocsd-web/games/SumSense/sumdiv.html
Sum Sense Multiplication: http://www.oswego.org/ocsd-web/games/SumSense/summulti.html
Knights of Math: http://www.multiplication.com/games/play/knights-math
Number and Operations—Fractions:
Fraction/Decimal/Percent Models: http://illuminations.nctm.org/Activity.aspx?id=3519
Matching Fractions, Decimals, and Percents: http://nrich.maths.org/1249
Fraction Models—5 Different Levels: http://www.bgfl.org/bgfl/custom/resources_ftp/client_ftp/ks2/maths/fractions/index.htm
Fraction Track Game: http://illuminations.nctm.org/Activity.aspx?id=4148
Multiplying Fractions: http://nlvm.usu.edu/en/nav/frames_asid_194_g_2_t_1.html?from=category_g_2_t_1.html
Adding Unlike Fractions: http://harcourtschool.com/activity/elab2004/gr5/11.html
Virtual Manipulatives (Including Fractions): http://nlvm.usu.edu/en/nav/category_g_2_t_1.html
Complete Fraction Game List: https://www.diigo.com/list/drewpolly/3_5_fractions
Thinking Blocks—Fractions: http://www.mathplayground.com/tb_fractions/thinking_blocks_fractions.html
Measurement and Data:
Area of a Rectangle: http://www.mathopenref.com/rectanglearea.html
Volume Shapes Game: http://www.sheppardsoftware.com/mathgames/geometry/shapeshoot/VolumeShapesShoot.htm
Cool Math Volume Game: http://www.coolmath-games.com/0-countcubes
Convert Units: http://www.ixl.com/math/grade-5/convert-customary-units-involving-fractions
Geometry:
Coordinate Grid: http://www.oswego.org/ocsd-web/games/BillyBug/bugcoord.html
Coordinate Grid Game-Catch the Fly: http://hotmath.com/hotmath_help/games/ctf/ctf_hotmath.swf
Classify Figures: http://www.ixl.com/math/grade-5/classify-quadrilaterals