Please take a look at these great websites for additional information and practice opportunities:
PBS Crash Course Chemistry https://www.youtube.com/playlist?list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr
Khan Academy https://www.youtube.com/user/khanacademy
Tyler DeWitt https://www.youtube.com/user/tdewitt451
PBS Crash Course Chemistry https://www.youtube.com/playlist?list=PL8dPuuaLjXtPHzzYuWy6fYEaX9mQQ8oGr
Khan Academy https://www.youtube.com/user/khanacademy
Tyler DeWitt https://www.youtube.com/user/tdewitt451