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[|RealWorldMath.org] This website provides various lessons that incorporate Concepts, Project-Based Activities, Measurement, and Exploratory Acitivities used by teachers. Each link on the webpage will open lessons within each group.

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Here is History Tours from: Jason Heiser is the [|Classrooms for the Future] coach at [|Selinsgrove High School]. Ian McCoog is an instructional specialist at [|Southern Columbia High School]. These might be useful in math too http://historytours.wikispaces.com/

I calculated 30 values and got the variance to 3.45-Meli