Recognition: Academic

General:

United States Academic Decathlon

UIL (Texas)

Odyssey of the Mind

Museums … (a link to a US list incoming)

Language Arts:

Book It!

National Novel Writing Month ( https://nanowrimo.org )

Overdrive (online branch of local libraries) — Disclaimer. ┬áThis may be a for-profit company that works with non-profit libraries.

Math: K-12:

Mu Alpha Theta

NML (TXML / CAML)

AMC / AIME / USAMO / IMO

MathCounts

Math: College:

AMS

Mathematical Association of America

Putnam Exam

Science:

Science Olympiads (US only)

International Physics Olympiads

Intel Science Fair