This is a basic lesson on clouds. Very nice photos of cumulus and cumulonimbus clouds are presented on the page as well as a description of all major cloud types and their associated weather. Two activities are presented. One invites the learner to create a cloud, while the other involves creating a collage of cloud images along with information about the weather associated with each cloud type. Full description.

This site was designed to provide explanations of some basic cloud forms and access to detailed pictures of representative examples of each type. Full description.

The site offers an interactive discussion of different vantage points associated with dam building. It describes some of the engineering and environmental issues that go into the process of selecting a site for building a dam and the conditions necessary for electrical generation. Links to classroom and family activities are organized by grade level. Full description.

This site facilitates a classroom activity in which students create a hypothesis on cloud formation and then conduct online research to either validate or refute their initial hypothesis. The activity begins with a brief laboratory experiment that demonstrates cloud formation and asks students to generate a hypothesis on how clouds form. The activity then switches to students conducting Internet research. ... Full description.