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Unlike many substances, water expands as it freezes. An ice cube takes up ~9% more volume than the water that made it!
"The YBTC programs provide students with a wonderful opportunity to expand their knowledge of chemistry and other scientific concepts."

-Kim Keith
Brenntag North America

You Be The Chemist Activity Guides           

YBTC Activity Guides Receive Teachers' Choice Award

Learning Magazine ® has selected the Fourth Edition Activity Guides to   receive a 2014 Teachers' Choice Award for the Classroom category! In its twentieth year, the Teachers' Choice Awards program is one of the most recognized and prestigious awards in the educational market. It is the only awards program that is exclusively judged by teachers in the classroom. CEF is honored to know that teachers enjoy using our materials to make science fun and engaging for their students. 

A longtime educator favorite, the You Be The Chemist ® (YBTC) Activity Guides: Lesson Plans for Making Chemistry Fun are a must have for those looking for ways to effectively introduce important science concepts through hands-on activities and real-world connections. These valuable teachers' aids are produced by CEF and include two booklets divided by grade levels; one for grades K–4, the other for grades 5–8. Download the YBTC Activity Guides for FREE!

The Fourth Edition Activity Guides feature nearly 1,000 pages of lesson plans, science content, activity sheets, and study materials designed to provide enriching scientific engagement in the classroom. This information is now available at the tip of your fingersfor FREE—by clicking on the download link below or by ordering the low-cost You Be The Chemist flash drive. Download and take the content with you, create selective printouts, display content digitally in the classroom—the opportunities are endless!

Click here to download for FREE

or order the YBTC Activity Guides Flash Drive!       


Complete our survey for a chance to win $150!

If you have used lessons from the YBTC Activity Guides in your classroom, please fill out our Online Survey to be entered into a $150 cash drawing!*

Thank You and Good Luck!

 *Drawing conducted annually with two $150 winners. 

Take a look at some of our favorite YBTC Activity Guide activities and resources!

Milk Rainbow

Grades 5-8

Separating Salt & Pepper

Grades 5-8

Mysterious Mixtures

Grades K-4

The Fourth Edition YBTC Activity Guides Include:

  • 50+ lesson plans

  • Alignments to the science education framework of the Next Generation Science Standards.

  • A cross-link between the concepts explored in each lesson with corresponding sections of the YBTC Challenge study materials

  • Real-world applications highlighting to students how the concepts learned in each lesson relate to things they see and use every day

  • Expanded content that includes more background information, modifications, and extensions for each lesson

  • In-depth activity sheets and corresponding answer keys

  • Electronic accessible online or via flash drives


CEF thanks the many people who have played a role in the development of the YBTC Activity Guides! Specifically, we would like to recognize and thank our valued contributors and program volunteers. The development and production of these guides are only possible through their generous support.