Website review by
Dana Anderson, Common Sense Media
Coolmath Website Poster Image
Popular with kids
Info and games designed to boost math's fun factor.

Parents say

age 8+
Based on 19 reviews

Kids say

age 8+
Based on 73 reviews

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A lot or a little?

The parents' guide to what's in this website.

Educational Value

Kids can learn math principles ranging from addition to calculus. Site sections feature geometry term definitions, graphing concepts, and other instruction. Each page contains a lot of elements, which can make navigation confusing; the ultra-bright color palette doesn’t help. CoolMath does a great job of clearly illustrating concepts using casual, conversational language -- answers are given with phrases like, “No way, dude!” -- and offers plenty of math problems to help kids practice their new number skills. Math games and more teach kids basic math concepts and application.

Positive Messages

Math can be fun and easy to understand with good instruction and practice.


The site has a lot of ads; in a "why we have ads" section the site's author asks visitors not to block ads. The site's author also sells her math books on the site.

Drinking, Drugs & Smoking

What parents need to know

Parents need to know that is a one-stop math shop for middle and high school students, and also has a helpful section for parents and teachers. There are a lot of ads, but other than that, it's a suitable place for kids to learn math and play educational games.

User Reviews

  • Parents say
  • Kids say
Adult Written byDemoniizo November 1, 2020

Worst web

I recommend that kids musnt play with it because its being rude for example if want to play a game with fullscreen i must watch an ad to have no ads i must jo... Continue reading
Teen, 16 years old Written bylovzhisdad October 18, 2012

Don't judge a website by its title.

Not all of the games have educational value
Teen, 16 years old Written byadmin1 November 2, 2020
It is a fun website but it only has a few educational games.
This website has caused many computers to crash and gives out your personal information DO NOT USE... Continue reading

What's it about?

Launched by a math teacher in 1997, COOLMATH offers info on addition, geometry, and other math concepts for grade-school- to high-school-aged kids. They can check out algebraic property definitions, learn multiplication tricks, or test out the online graphing calculator; separate sections also offer parents and teachers math-related activities and advice. The site also links to several other sites, including a math site for younger kids,, and sites about teen stress management and other topics.

Is it any good?

Since 1997, math teacher "Coolmath Karen" has run this award-winning site to spark kids' interest in all things math. The online math dictionary and calculators alone are enough to teach most basic math concepts, including algebra and geometry. In addition to the main sections for math practice, games, a math dictionary, and lesson help, there are also sections for parents (how to help with math homework: crying isn't a good sign) and teachers (tricks for getting kids motivated in the classroom). It also links to a companion site for younger kids ( and other teen-related sites ( and If you're a mathphobe or love to play math games or are just stuck on a new math concept in school, you should add COOLMATH.COM as one of your bookmarks.

Talk to your kids about ...

  • Families can talk about why this math clearinghouse is so popular. What elements does it have that make math fun and understandable?

  •'s creator writes in detail about why the site contains a lot of ads. Families can talk about what they think of ads being on an educational site. Our parent tips on selling to kids will give you some talking points.

Website details

  • Subjects: Language & Reading: following directions, reading
    Math: algebra, arithmetic, geometry
  • Skills: Thinking & Reasoning: applying information, problem solving
    Self-Direction: academic development, personal growth
  • Genre: Educational
  • Price: Free
  • Pricing structure: Free (It's $5.99 per month to go ad-free on the linked games site.)
  • Last updated: March 4, 2021

Our editors recommend

For kids who love to find homework help online

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