Number Sense
http://www.abcya.com/base_ten_fun.htm
(number building with base ten blocks)
https://www.turtlediary.com/game/counting-tens-and-ones.html
(building numbers)
https://www.education.com/game/place-value-machine/
(advanced place value)
http://www.abcya.com/number_bingo.htm
(number recognition)
http://www.topmarks.co.uk/ordering-and-sequencing/caterpillar-ordering
(ordering numbers)
http://www.abcya.com/numerical_order.htm
(ordering numbers)
http://www.sheppardsoftware.com/mathgames/earlymath/BalloonPopSkip.htm
(skip counting)
Patterns :number patterns and shape patterns
http://www.abcya.com/patterns.htm
Addition and Subtraction
http://www.softschools.com/math/games/fishing_sub.jsp
http://www.softschools.com/math/games/
http://www.sheppardsoftware.com/math.htm
http://www.abcya.com/addition.htm
http://www.abcya.com/drop_sum.htm
http://www.abcya.com/first_grade_word_problems_add_subtract.htm (Word Problems)
http://www.abcya.com/subtraction_game.htm
http://www.abcya.com/math_facts_game.htm
http://www.ches.marshall.k12tn.net/first%20grade/index_files/page352.htm ( math facts practice)
Graphs
http://internet4classrooms.com/skill_builders/graphing_math_first_1st_grade.htm
Odd and Even
http://www.doorwayonline.org.uk/oddandeven-fullscreen.html
Geometry/Shapes
http://www.sheppardsoftware.com/mathgames/earlymath/shapes_shoot.htm
http://www.topmarks.co.uk/maths-games/5-7-years/shapes
Place Value
http://www.abcya.com/base_ten_fun.htm
http://www.ictgames.com/sharkNumbers_v2.html
http://www.ictgames.com/sharknumbers.html
Telling Time
http://www.abcya.com/telling_time.htm
http://www.kidsolr.com/earlychildhood/page4.html
http://www.primarygames.com/time/start.htm
Money
http://www.abcya.com/counting_money.htm
http://www.kidsmathgamesonline.com/money/moneycounting.html
http://www.sheppardsoftware.com/mathgames/matching/memoryMath_coins_level1.htm