Periodically ship the class a trigonometric application. Pupils model the level of water in a port. Using their models, learners determine the times that a ship can safely navigate into and out of the port, along with determining other...

Can Earth's oceans produce a steady supply of clean energy? Scholars explore the uses of tidal and thermal energy in the 11th installment of a 13-part series about ocean-based alternative energy sources. Learners examine the...

[Free Registration/Login may be required to access all resource tools.] This is a science text for Grade 2. Section titles include: A World of Ice and Water, Changes, Earthquakes, The Grand Canyon, Mountains, Preventing Erosion, Tidal...