Khan Academy — https://www.khanacademy.org/

CK-12 — https://www.ck12.org/student/

Coursera — https://www.coursera.org/

Storybird — https://storybird.com/

CommonLit — https://www.commonlit.org/

Grammarly — https://www.grammarly.com/

PhET Simulations — https://phet.colorado.edu/

Code.org — https://code.org/

MIT OpenCourseWare (HS) — https://ocw.mit.edu/high-school/

iCivics — https://www.icivics.org/

Crash Course (YouTube) — https://www.youtube.com/user/crashcourse

Canva — https://www.canva.com/

Chrome Music Lab — https://musiclab.chromeexperiments.com/

Behance Inspiration — https://www.behance.net/

Quizlet — https://quizlet.com/

Duolingo — https://www.duolingo.com/

Khan Academy SAT/ACT Prep — https://www.khanacademy.org/test-prep

Typing.com — https://www.typing.com/

Keybr — https://www.keybr.com/

Nitro Type — https://www.nitrotype.com/

NYT Daily Games — https://www.nytimes.com/crosswords

Lumosity — https://www.lumosity.com/

Braingle — https://www.braingle.com/

Puzzle Baron — https://www.puzzlebaron.com/