 classroom activities the two activities are ideally completed in chronological order the research question and hypothesis activity is primarily a brainstorming process the peer review activity allows different research groups to review each other s work additionally we have two activities to support the video peertopeer claim sharing on vimeo  the scientific claim proposal video and the scientific claim video review video peer review allows students from different school to share and review each other s claims this is an excellent way for students to solidify their thinking for a broader peer audience we suggest having a question board or an i know i think board in the classroom to help the class refine their model and therefore their claim  mercury in watersheds hypothesis classroom activity  