Ninth graders compare ancient and modern technology in water transporting. In this lesson on the evolution of the aqueduct, 9th graders build a working aqueduct model and examine its components. They explain the importance and use of the...

Young scholars examine the effect of foreign species on various habitats. In groups, they identify the population dynamics of the zebra mussel. They calculate averages and graph data from Seneca Lake in New York. They develop...