Learn why sea urchins are taking over Big Bay in this interactive from WNET. In the accompanying classroom activity, students watch a series of Cyberchase videos and then work together in groups of two to complete an associated activity. As they use the interactive, students will represent the data that they collect in a double bar graph in order to make comparisons with a healthy bay and analyze the factors leading to the problem. This resource is part of the Math at the Core: Middle School Collection.
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