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Density - Introducing a Free Online Resource for Middle School Chemistry
All web seminar participants use online tools that allow them to mark-up presenter's slides or share desktop applications in addition to engaging in chat with others online and answering poll questions

This Web Seminar took place on October 4, 2012 from 6:30 p.m. to 8:00 p.m. Eastern Time. The presenter was James Kessler, Manager of K-8 Science Education at the American Chemical Society. In this Seminar, Mr. Kessler shared lessons and activities from the third chapter of, a web-based resource that helps teachers engage middle school students with chemistry concepts.

The PowerPoint, related resources from the NSTA Learning Center, and web links from the presentation are now contained in the above resource collection. Clicking on the collection link will place it in your Learning Center, My Library, neatly organized under the My Resource Collections tab.

This was the third presentation in a series of six web seminars covering each of the six chapters in During the program, Mr. Kessler gave a tour of the website, then provided a detailed look at the lessons featured in chapter three. He shared activity ideas and multimedia clips that can help students gain a real-world understanding of density on the molecular level. Participants discussed the application of the lessons to their own classrooms and shared ideas for modifications and extensions. Patti Galvan and Adam Boyd from the American Chemical Society helped out by answering participant questions on the chat.

Seminar participants received one of the NSTA SciGuides. A certificate of attendance was deposited into participants' My PD Record and Certificates area in the NSTA Learning Center for completing the evaluation form at the end of the program.

Here are some comments provided by the participants at the end of the Web Seminar:

  • “I loved the interactive nature of this presentation. I felt involved every step of the way.”
  • “This resource was excellent. I love that it will help teachers as they may be transitioning to new styles of teaching with the new standards.”
  • “I like learning new ways of teaching concepts that I already teach. I will definitely use the activity with the colored hot and cold waters.”
  • “Excellent session, a lot of information, resources and experiments for kids!”

Thanks to the participants and the presenter for the learning opportunity, the interactions, and a job well done!

See when other American Chemical Society (ACS) Web Seminars are scheduled

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Underwritten by American Chemical Society