Students learn about types and properties of waves, the design and effectiveness if simple machines, the characteristics and behaviors of light, and the usefulness of various forms of energy. Includes 4 posters. Each poster measures 17" x 22".

Key Features :

i : Decorate and educate with these four 17" x 22" posters
ii : Posters feature activity sheets on the back of the posters and includes a teacher's guide
iii : Great to brighten any classroom