Basic Facts 1-20
Practice
Basic Addition Strategies Videos
More Addition Strategies Video
BASIC ADDITION FACTS
Sheppard's Math
https://www.sheppardsoftware.com/mathgames/menus/addition.htm
Doubles
http://www.sheppardsoftware.com/mathgames/monkeydrive/addition/MDAddDoubles.htm
Building a Tens Frame (do all categories: How Many More, Build, Fill, Add)
http://illuminations.nctm.org/activity.aspx?id=356
Penguin Party Addition
http://www.sheppardsoftware.com/mathgames/popup/popup_addition.htm
Matching Addition
http://www.sheppardsoftware.com/mathgames/matching/matching_addition.htm
Falling Stars Addition
http://www.sheppardsoftware.com/mathgames/catchthestars/catchthestarsmenu.htm
Addition Bingo
https://www.varsitytutors.com/aplusmath/matho/addition