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CK-12 - AppSense | AppSense

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CK-12

CK-12

CK-12

FREE

Free online textbooks and resources for STEM.

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About

CK-12 provides free, customizable K-12 STEM resources, including textbooks, simulations, and interactive tools to support personalized learning.

Pricing

Pricing Type

Free

Free tier available

Billing

Custom pricing

Last checked: February 22, 2026

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Key Facts

Categories

Platforms

Web

Company

CK-12 Foundation

Founded

Founded in 2006

Country

Global

Language

English

Social Links

Quick Info

Website