Ed. note: App of the Week picks are now being curated by the editors of Common Sense Education, which helps educators find the best ed-tech tools, learn best practices for teaching with tech, and equip students with the skills they need to use technology safely and responsibly. Click here to read the full app review.

What’s It Like? With CK-12, students can create an account by entering their email address and a password. They can then explore the site, which is divided into Mathematics, Science, and More. Mathematics includes subjects from arithmetic to trigonometry and statistics. Science covers all the bases: biology, chemistry, and physics, as well as life, earth, and physical science. The More section offers history, technology, and economics. Within each subject, you can click on a circle, each of which contains a number of Concepts (short, chapter-like lessons). For example, if you click on Phases of Matter, you will be given a list of topics that includes evaporation, sublimation, and solutions. Within these topics, you can choose from a series of modalities: Read, Practice, Video, Real World, and more.

Price: Free

Grades: K-12

Rating: 4/5

Pros: The information is well organized, the site is beautifully designed, and the wealth of content is outstanding.

Cons: Some sections could be more fleshed out, and the interactives often lack rigor.

Bottom line: Making STEM content accessible to kids with different learning styles, CK-12 could be the key to mastery for some students.

About the Author:

Stephen Noonoo

Stephen Noonoo is a former editor of eSchool News. He has served as a consultant for CUE, California’s ISTE affiliate, and as managing editor of its quarterly publication, OnCUE. He has worked as a freelance writer, an education editor for SmartBrief newsletters, and as a staff editor for a well-known publication focusing on education technology.