Reading: 
Scholastic Resources for reading/writing: Scholastic activities

Take an Accelerated Reader quiz:AR quizzes

Benchmark Library: log in through Clever

Math:
Khan Academy: log in through Clever

Math worksheets (tons to choose from): https://www.commoncoresheets.com/

Alvey Portaportal: link to many math games: Alvey Portaportal

Powertest: Powertest login 

Science:
Brainpop (Username - alvey; Password - sunrays): https://www.brainpop.com/