26 Kahoot

Whole class game in which students compete to answer questions quickly as well as correctly.  A scoreboard updates after every question to keep students engaged and fighting for the top spot. (FREE)
“The students loved it, they want to do one before every quiz/test.” Kristen Cooper at Clark

87 Kaizena

Use your voice to more quickly leave comments and feedback on student work with Kaizena.  (FREE)

32 Khan Academy

Build standards aligned online review activities for your students to practice applying knowledge and skills. (FREE)
“I liked the subject being explained by a different teacher.” Roberta Rotolo at Godwin