7-Day Study Session Streak
Study or practice something for 20 minutes each day for a week. Check in once a day.
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Education · Facts & stats · iChallenge network
Daily facts and stats about schools and learning, plus real challenges to put them to work.
Old-fashioned classroom blackboards were traditionally made from what stone?
Blackboards were traditionally made from smooth dark slate.

One ranked attempt per day. Practice as much as you like.
Join one, log your days or post your proof. Finishing earns XP and the Finisher badge.
Study or practice something for 20 minutes each day for a week. Check in once a day.
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Teach a friend or family member a skill or fact you learned and post a short write-up of how it went.
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Review a small set of flashcards every day for two weeks. Check in daily.
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Research the history of a school near you, like when it opened, and post a short write-up.
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Live counts from SchoolChallenge.com. All arena stats →
Earned on any arena, shown on your profile everywhere.
Add your email to keep your level, streak and badges if you switch devices, and carry them to every iChallenge arena. One email when you save; no spam.
Fund a prize on SchoolChallenge.com and your brand sits on the challenge card, the leaderboard and every finisher's share. Prizes only appear once they're funded, so players can trust what they see.
Quiz banks rotate across the vertical topic of this site.
Yes — teachers share one link and track scores on the leaderboard.
Everyone on this arena gets the same five questions each day, from easy to hard. You get one ranked attempt; practice rounds are unlimited.
100 points per correct answer, up to 50 more for answering quickly, a combo multiplier for answers in a row, and 150 bonus points for a perfect round.
Yes. Playing, streaks, badges and leaderboards are free. Some challenges carry a sponsor-funded prize; the challenge card shows it when one is funded.