Khan Academy
Khan Academy: Addition Using Groups of 10 and 100
In this exercise, students practice addition using groups of 10 and 100. Students receive immediate feedback and have the opportunity to get hints, watch a video tutorial, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2...
NumberNut
Number Nut: Numbers and Counting: Counting From One to Ten Activity
A game where the player must first click on the picture showing one less dot than the given number, then on the picture with one more.