BrainFlex Summer 2017
Get active and happy this summer.
Build your math and science skills with daily practice.
BrainFlex 2017 is over!
Are you a student?
Pick the subjects
you want to practice.
Practice something every day.
Anytime and anywhere.
We will help you stay on track
and monitor your progress.
I accept the challenge
Are you a teacher or a parent?
  • Invite students to get a head start or review concepts they missed.
  • Utilize free math and science practice daily, which students can do anytime, anywhere.
  • Track your student's progress over the 8-week challenge.
Invite students to join CK-12 BrainFlex
Enter atleast one email
Enter a valid email
Invite your CK-12 classes
life science life science life science
Number of minutes in a day: 1440
Number of minutes you need to practice: about 20

That's right – there's time for sleeping in, time for hanging out with friends, and time for keeping your brain in shape. My challenge for you this summer is pretty easy – keep your brain in the game and practice about 20 minutes every day with CK-12 BrainFlex.
Enter your full name
Please enter valid name
Enter your email Id
Enter a valid email
Send invitation email
Want to invite your CK-12 classes?
Invite students
Download & Share:   
BrainFlex Flyer    |    Letter to Parents
Did you participate last year?
Double thumbs up for you
If you participated in CK-12 BrainFlex this summer.
Your brain is happy, healthy and ready for the school year!
Your longest streak? Long.
Most correct answers? A lot.
Concepts covered? Look at that list!
Let's see everything you accomplished:
See my final report
Weren't able to join BrainFlex this summer?
No worries! You can practice anytime and anywhere on CK-12.
Simply pick a subject and get right to it!