Want to keep your brain fit this summer and learn 31 new ideas in the month of July? Do both by signing up below to take the second annual TED-Ed July Challenge! Beginning on July 1, once a day for 31 days, you’ll receive a TED-Ed Lesson. Watch the video and answer the questions. That’s it! You can do the lesson on the same day you get it, or you can wait and do a few at the same time just so long as all 31 lessons are done in July. However you choose to do it, we’re cheering you on!