Open-and-go lessons that inspire kids to love science.

Science curriculum for K—5th grades.

90 sec
  • Hands-on — lead students in the doing of science and engineering.
  • Standards-aligned science lessons — Cover core standards in 1-2 hours of science per week.
  • Less prep, more learning — prep in minutes not hours. Captivate your students with short videos and discussion questions.

Sign up now to try Mystery Science for free.

Sign up

Learn more

Open-and-go lessons that inspire kids to love science.

Sign up now for tons of free lessons like this one!

Back

Mini-lessons

Video Bonus Vote
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?
Full Screen
Controls Icon Exit Full Screen
Video trouble?

Voting for this episode is now closed. Would you like to vote on the most recent poll?

We pulled three questions from our jar. Which question do you want to explore?

  • How is cheese made?

    -Glenn, 2nd Grade

  • Why do animals have tails?

    -Eowyn, 4th Grade

  • How many stars are in the sky?

    -Danna, 3rd Grade

How many people are in the world?

Watch the video to discover the answer and don't forget to vote for next week's question. There are mysteries all around us. Have fun and stay curious!