This product includes ALL of my 4th Grade Next Generation Science supplemental products for Physical Science, Life Science, and Earth Science. That's 340 pages worth!!Each of the products can also be purchased individually, if you prefer.The products included in this bundle include:4-PS3-1 Speed and Energy4-PS3-2 Energy Transfer: Heat, Sound, Light, Electricity4-PS3-3 Colliding Objects and Transfer of Energy4-PS3-4 Designing a Solar Oven4-PS4-1 Waves: Amplitude and Wavelengt