Please note: Some of the sites listed below have been recommended by other teachers or students and I have not personally used each and every one. Please let me know if there are any links that are not working, if you have any links that you would like to share, or if you have any suggetions.
Mixed Math:
http://www.oswego.org/ocsd-web/games/Mathmagician/cathymath.html
http://www.factmonster.com/mathmoney.html
http://nlvm.usu.edu/en/nav/grade_g_1.html
http://www.toonuniversity.com/free/math-games-1st-3rd.asp
Addition Practice:
http://www.thegreatmartinicompany.com/addition.html
http://www.primarygames.com/flashcards/addition/addflash.htm
Math Facts Painting:
http://funschool.kaboose.com/formula-fusion/games/game_paint_brush_math.html?trnstl=1
Subtraction Practice:
http://www.primarygames.com/takeaway/start.htm
Fun Math Activities:
http://www.abc.niet.au/countusin/games/game8.htm
Skip Counting:
http://www.tvokids.com/framesets/play.html?game=51&
http://www.abcya.com/connect_the_dots_bear_2s.htm
http://www.freemathtest.com/FreeMathTest.asp?C=Sequences&MIN=2&MAX=24&STEP=2
Numbers:
http://www.aaamath.com/k2d-count.html
http://www.quia.com/mc/65757.html
http://www.primarygames.com/Number%20Game/start.htm
Place Value:
http://www.ictgames.com/dinoplacevalue.html
Fractions:
http://nlvm.usu.edu/en/nav/frames_asid_104_g_1_t_1.html
http://www.aaamath.com/B/fra16_x2.htm
Patterns:
http://www.funbrain.com/cracker/index.html
http://mathforum.org/varnelle/patterns.html
http://www.primarygames.com/patterns/start.htm
Measurement:
http://www.funbrain.com/measure/index.html
http://fwt.txdnl.com/4-10/w/e/weddell/mw/ruler/ruler_cm.swf
Money:
http://www.coe.uh.edu/archive/math/math_lessons/mathles3/tutor.htm
http://www.hbschool.com/activity/counting_money/
http://www.quia.com/mc/4918.html
http://www.myschoolhouse.com/courses/O/1/11.asp
Time
http://www.bbc.co.uk/wales/snapdragon/yesflash/time-1.htm
http://www.primarygames.com/time/start.htm
http://www.fi.edu/time/Journey/JustInTime/hour_quiz.html
Calendar
http://www.fi.edu/time/Journey/JustInTime/calendar/calendar1.html
Shapes
http://bright-productions.com/kinderweb/tri.html
http://www.thekidzpage.com/learninggames/shelfshapes.htm
http://www.paulysplayhouse.com/paulys_playhouse/games/krog_shapes.html
http://www.primarygames.com/puzzles/match_up/shape_match/start.htm