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Thank you so much for the amazing resources you offer. I just began teaching this year, after many years as an education director for a non-profit. It is so wonderful to find resources that are as detailed, rigorous as yours. I also appreciate that so many of your resources use data! (The non profit I worked for supported the science of the Hubbard Brook Ecosystem Study and I too, tried to take data and turn it into something useful for teachers.... no easy task. I was excited to see that you used data from HB in one of the ecology activities that have students think about energy flow through an ecosystem.) I use your resources often- THANK YOU.

I'm also writing with a question about the activity: "Who took Jerell's iPod: An Organic Compound Mystery." The procedure states that students will test dry and liquid substances, and that it's important to keep and test them separately. I don't understand what the liquid samples might be? All of the ingredients in the lunches belonging to the various "possible suspects" seem to contain only dry ingredients. Can you please clarify? Thanks so much!

Jacquelyn Wilson