These are provided by the National Science Teachers Association free of charge. Listed here are available e-books based upon what we have covered this year.
Class topic(s): Earth's motion in space, seasons, moon
Class topic(s): Populations, renewable energy
Class topic(s): Carbon cycle, energy
Class topic(s): Plate tectonics, erosion, landmasses
Class topic(s): Plate tectonics, earthquakes, volcanoes
Class topic(s): Geology
Class topic(s): Astronomy
Class topic(s): Weather and climate