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Babtunde and I, found a search engine for interactive lessons on:

http://jc-schools.net/tutorials/interactive.htm

We refined our search on this search engine and under the "science" category we found an environmental science activity on:

http://www.secretsatsea.org/main.html

This is an engaging activity that requires the students to literally, follow a story/case in order to save the food web. It is constantly quizzing the user in different fashions and at the same time requires the user to think by himself/herself on what the next step to solving this mystery is.

Upon starting this activity, Babtunde and I, had trouble going through the lesson because there were no direct instructions on what to do. However after clicking around the page for a few mintues, we were able to find our way to solving the case. Having gone through it once, it is significantly easier to navigate and instruct others.