◇ The library grows ◇

Contribute a new learning activity

Anyone can contribute — guides, teachers, parents, and learners.
Strata Mundo's library grows from what works in real practice.
Every submission is AI-vetted, then human-approved.

Activity titleWhat does the learner do, and what concepts does it teach?Describe the action and the concept together. The AI will tag the CCSS standards and misconceptions for you. (At least 20 characters.)Modality

Video

A video the learner watches.

Hands-on / manipulative

A physical material the learner touches and arranges.

Game or interactive

A digital simulation, game, or interactive applet.

Worksheet

A printable or PDF practice set.

Other

Something that doesn’t fit the categories above.

LinkOptional. URL to the activity if it lives online. You can type abc.com — we'll add https:// for you.Source / vendorOptional. e.g., Khan Academy, PhET, Lakeshore, Didax.

Duration (minutes)Optional. About how long does this activity take?

◇ Your details ◇

Your nameYour emailSo we can confirm receipt and follow up if we have questions.

Reviewed by Claude Opus 4.7 first, then by a human.

How submissions are reviewed

Your submission is read by Claude Opus 4.7 against a documented set of pedagogical criteria, then forwarded to a human reviewer for final approval. The full criteria — both AI and human — are published on the Methodology page. You'll receive an email confirmation either way.