https://www.multiplication.com/games/addition-games Addition games for 3rd at multiplication.com
https://www.multiplication.com/games/subtraction-games Subtraction
https://www.multiplication.com/games/all-games Multiplication
https://www.multiplication.com/games/division-games Division
https://www.multiplication.com/games/strategy-games Strategy GAmes
https://www.hoodamath.com/games/third-grade.html Hooda Math 3rd
https://www.multiplication.com/games/subtraction-games Subtraction
https://www.multiplication.com/games/all-games Multiplication
https://www.multiplication.com/games/division-games Division
https://www.multiplication.com/games/strategy-games Strategy GAmes
https://www.hoodamath.com/games/third-grade.html Hooda Math 3rd
http://www.education.com/games/math/
TESSELLATIONS
http://www.shodor.org/interactivate/activities/Tessellate/ (Tesselations)
http://gwydir.demon.co.uk/jo/tess/tess.htm
http://gwydir.demon.co.uk/jo/tess/sqtile.htm
http://gwydir.demon.co.uk/jo/tess/tri.htm
https://illuminations.nctm.org/Activity.aspx?id=3533
http://www.tessellations.org/links.shtml
http://gwydir.demon.co.uk/jo/tess/tess.htm
http://gwydir.demon.co.uk/jo/tess/sqtile.htm
http://gwydir.demon.co.uk/jo/tess/tri.htm
https://illuminations.nctm.org/Activity.aspx?id=3533
http://www.tessellations.org/links.shtml
http://www.learningbox.com/Base10/BaseTen.html (bsehttp://www.hoodamath.com/ HoodaMath by grade and topic
http://www.arcademics.com/games (ARcademic games by grade and topic)
http://jmathpage.com/topics/jmpfrontgrades.html (sorted by grade and topic)
http://www.mathplayground.com/ (Math Playground games by topic)
http://www.softschools.com/grades/1st_grade/math/ (softschools games by grade or by topic)
https://www.digitwhiz.com/ (adaptive games 8+, starts with multi)
Wizen World-not free but interesting (3-8)
prodigygame.com (free but some ads like wizard 101)
Splash Math (limited and assigns usernames and passwords
http://www.beaconlearningcenter.com/WebLessons/SumFun/default.htm#page4 (addition chart enter numbers)
http://www.primarygames.com/holidays/thanksgiving/games/turkeytens/ (count by 10's and drag and drop numbers onto turkey)
http://www.learningbox.com/Base10/BaseTen.html (base 10 blocksdrag)
http://www.thegreatmartinicompany.com/vertical-addition.html (flashcards-enter number)
http://www.freemathtest.com/Fundamental_Math/Addition/Test.aspx?min=1&max=5&Qty=10 10 question test-enter number and use tab key)
http://www.members.shaw.ca/computerteacher/rainforest.asp.html
TIME
MONEY
http://hrestech.weebly.com/telling-time.html (about 5 websites listed)
http://pbskids.org/fetch/games/minigolf/php/game.php (Fetch Monumental mini-goilf
http://pbskids.org/lab/games/
http://pbskids.org/lab/games/