Educational sites offer activities, videos, quizzes

—BrainPop Jr., ages 5 and older

With videos, graphics, games, and printables, this fee-based site has a wide variety of educational resources in science, health, writing, reading, social studies, math, and more. Created by educators, the activities are aligned with state and national standards. If your kids’ school has a subscription, you may be able to access the site with your kid’s login.

—Arcademic Skill Builders, ages 6 and older

More than 55 free games are grouped into more than 15 subject areas, ranging from shapes to algebra and geography. After kids play one of the games, they get immediate feedback so they can try to surpass their own achievements.

—Zoowhiz, ages 6 and older

A zoo theme draws kids into a virtual learning playground offering math and language-arts activities, a personal zoo kids can decorate, and arcade games. The practice is solid, and the games and educational activities are separate (though some arcade games have embedded learning goals). There’s a free version and a premium version.

—PBS KIDS Go!, ages 7 and older

Based on PBS’s educational TV shows, this free site is jam-packed with games, videos, and quests featuring kids’ favorite PBS TV show characters. If kids already love the shows, they’ll probably love the learning games. With a safe social element, kids can connect with friends who also use the site.

—TVO Kids, ages 7 and older

Though kids might not know the Canadian TV show that inspired this site, they can still have fun playing the dozens of free learning-based games and activities. Covering everything from the five senses to constellations, the content includes clever games, short videos, and contests that reward kids.

—Curiosity Machine, ages 8 and older

Science and engineering are the stars in this free, project-based site where kids watch how-to videos and then complete a challenge. Kids can even connect with mentors to get more guidance.

—FactMonster, ages 9 and older

Sponsored by the online education provider Family Education Network, FactMonster offers information on dozens of topics, including science, math, and U.S. history. Kids can take quizzes, play games, and use reference tools such as an atlas, a dictionary, and the periodic table — all for free — as they complete homework.

—CoBELS, ages 10 and older

This fee-based, Indian math and science site encourages kids to think critically as they create equations or hypotheses to solve realistic problems such as preventing sheep from escaping a barn or saving a plant from pollution. Each activity or game targets a specific learning objective and provides immediate feedback and game scores to help kids know how they’re progressing.

—Code Monster from Crunchzilla, ages 11 and older

Kids get free, hands-on JavaScript coding lessons from a friendly monster and apply what they’ve learned via quizzes and projects. Though there isn’t much help when kids struggle, they can always try again and revisit levels.

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Common Sense Media is an independent nonprofit organization offering unbiased ratings and trusted advice to help families make smart media and technology choices. Check out our ratings and recommendations at www.commonsense.org.