electricity/magnetism experiment

https://www.youtube.com/watch?v=UY7LT3gNHXI

Electricity/Magnetism

http://www.physics4kids.com/files/elec_intro.html

Estimation/Compatible numbers

https://www.youtube.com/watch?v=vf79Xd9ES-A

Compatible numbers

https://www.youtube.com/watch?v=GWa-plc99bQ

Compatible numbers

https://www.youtube.com/watch?v=u4CdVT-PLO8

Great Plains

http://justtofresh.weebly.com/great-plains.html

Great Plains Flashcards

http://quizlet.com/15557959/landmarks-flash-cards/