General  

ReadNQuiz

Imagine Learning

IXL  

Brainz

Brain Pop

Starfall

Ask

Gamequarium

Free Typing Game

Mr. Nussbaum Learning & Fun

Fact Monster

Gogooligans

Cybersleuth Kids

Discovery Education 

Kid Smartz

Common Sense Media 

neoK12 

Language Arts

Free Rice 

Dictionary

Thesaurus

Encyclopedia Britannica 

Vocabulary.com

Spelling City

Puzzles.com

Word Twist

Math 

Prodigy

National Library of Virtual Manipulatives

Xtramath

Learn Zillion

Yummy Math

Multiplication.com

AAA Math

Math Playground 

Science

Bill Nye the Science Guy 

Desert USA

San Diego Zoo

Chem4Kids

NASA

NASA Kids Club

Solar System Exploration

Hubble Site

Astronomy Kids

How Stuff Works

Nitro Type

Social Studies and History

National Geographic for Kids

Smithsonian

Next Generation Science Standards 

NGSS Engineering Design

Teach Engineering

National Science Teachers Association

San Diego County of Education

Tech 4 Learning 

Learn about frames and claymation

Mackin Maker

Learn about Maker Kits

Rule Your Room Kit

Ozobot

Learn about Bit

How to play with Bit

Fun Games with Ozobot Bit and Evo that teach you programming

Draw - program with colors

Print Games - Play

Ozobot Bit Apps

Web Games

Ozoblockly Games

LittleBits

Learn about electronic kits

Wonder Workshop

Learn about Dash and Dot

Sphero

Learn about Spark