This is an "anticipatory guide" I made for our light unit in Science. The kids fill out true or false at the very beginning. Then, at the end of the unit, I hand their papers back and they respond to the same statements (thinking about what they learned). I made this worksheet first and then threw some of the facts into other worksheets/powerpoints so they had them in their notes. They love to see how much they learned. An answer key is included on the 2nd page.