CK-12 Foundation
https://www.ck12.org/pages/overview/
WEBCK-12 Interactives: Simulations & PLIX. PLIX. These interactives have students “Play, Learn, Interact, and eXplore” a single concept. CK-12 has over 1,200 math and science interactive PLIX. Each PLIX offers: – a simple exploration of a single concept. – follow up questions with hints. – open discussion questions for higher-level thinking.
DA: 53 PA: 19 MOZ Rank: 42