Freckle by Renaissance

Freckle by Renaissance empowers more than 900,000 teachers to reach every one of their students across Math, ELA, Social Studies and Science. 

Freckle provides fun, challenging practice activities that fit the way students learn best. Students see their progress over time as they move through increasingly complex levels. Embedded supports and scaffolds help them master even the most challenging concepts. 

To learn more, sign up at https://www.freckle.com.