This resource is free on desktop and laptop computers (paid membership required on phones and tablets). This site has a variety of learning games for all subjects areas. You can sort games by grade level or subject area.
These are games aligned with kindergarten standards that we use often in class:
-Fuzz Bugs: Counting, Sorting, and Comparing
-Sight Word Bingo
-Molly Adds and Subtracts to 10
-Adventure Man Dungeon Dash: Shapes and Colors