What Is Mathplanet and What Math Courses Does It Offer?

Updated

Mathplanet (selenite.cc) is a free, accessible platform for learning mathematics, offering high school math courses in Pre-algebra, Algebra 1, Algebra 2, and Geometry. It suits students who want to self-study math or supplement classroom learning, and it requires no payment based on the available site information.

What Mathplanet Is

Mathplanet presents itself as a free, accessible platform for learning mathematics. Its stated focus is high school math, delivered through structured courses rather than a general-purpose education catalog. The site's own description lists four course areas:

  • Pre-algebra
  • Algebra 1
  • Algebra 2
  • Geometry

Who the Courses Are For

The platform is aimed at high school-level learners. Based on the course list, it fits two common situations:

  • Self-study: You want to work through a math topic on your own pace without enrolling in a formal class.
  • Supplemental learning: You are taking a math course elsewhere and want extra material to reinforce the same topics.

Because the courses are introductory-to-intermediate high school math, they are less suited to advanced undergraduate topics such as calculus or linear algebra, which do not appear in the listed course set.

How to Use It

  1. Go to selenite.cc.
  2. Choose one of the four course areas: Pre-algebra, Algebra 1, Algebra 2, or Geometry.
  3. Work through the lessons in that course.

The expected result is that you can study high school math topics for free, at your own pace, without a paid subscription.

Common Points to Check

  • Device support: The site displays a message that your device is not supported and asks you to rotate your screen for the best experience. If you see this, try a different device or orientation before assuming the content is unavailable.
  • Loading behavior: The site notes it is loading your game and asks you to allow it to fetch data first, which "should only take a second." If content does not appear immediately, wait briefly rather than reloading repeatedly.
  • Scope: Only the four listed courses are confirmed. Do not assume additional subjects or levels are offered unless the site states so.