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The Middle School Chemistry Project

What happens when solids, liquids, and gases are heated and cooled? Why is one substance more or less dense than another? What causes certain substances to dissolve in water? What happens when a chemical reaction takes place?

These questions and many more are explored in Middle School Chemistry, a resource of guided, inquiry-based lesson plans that covers basic chemistry concepts along with the process of scientific investigation.

The book helps students:

  • Ask scientific questions and investigate them
  • Design and conduct experiments
  • Understand their observations on the molecular level
  • Record and communicate results

For teachers, Middle School Chemistry includes:

  • Comprehensive 5-E lesson plans
  • Detailed procedures for activities
  • Science background for teachers
  • Molecular model illustrations and animations
  • Student activity sheets and student reading

You can download the entire book for free in PDF format.


The activities described in are intended for students under the direct supervision of teachers. The American Chemical Society (ACS) cannot be held responsible for any accidents or injuries that might result from conducting the activities without proper supervision, from not specifically following directions, or from ignoring the cautions contained in the lessons.

The term “goggles” used in the safety section of each lesson refers to chemical splash goggles as shown in the picture above and in the icon accompanying every activity in the lessons.

The Authors

Middle School Chemistry was developed and written by Jim Kessler, Patti Galvan, and Adam M. Boyd at the American Chemical Society.

Patti worked as an elementary school teacher with a keen interest in science education before coming to ACS. Jim was a high school science teacher and has been developing resources for K–8 teachers for 20 years. Adam's areas of expertise include chemistry, writing, and the web.

Have a question about the Middle School Chemistry? A great suggestion? Contact us!