Plan a complete science fair project, from a testable question through a CER-style conclusion, applying investigation-design and communication skills built across the whole year.
This year moved from cell theory in week 1 all the way to designing and communicating real chemical investigations. A science fair project is the natural capstone, because it requires nearly every skill practiced along the way: a testable question and a fair design (week 34), real data collection, a model where one is useful (like week 7's organ model), and a clear CER-style conclusion (week 35). A good project can come from any unit this year -- cells and body systems, ecosystems, heredity and selection, or chemistry -- the important thing is a real, specific, testable question, not the topic itself.
A complete project has these parts: a clear question, brief background research explaining why the question matters scientifically, a hypothesis written as an if/then/because statement, a materials and procedure description detailed enough for someone else to repeat, real data, an analysis of what the data shows, and a conclusion stating whether the evidence supported the hypothesis. A display or presentation communicates all of this clearly to someone who was not there to watch it happen.
Mastery looks like: They can independently draft a testable question, an if/then/because hypothesis, correctly identified variables, and a CER-style conclusion plan connected to a real topic from this year.
Common stumbles: Writing an untestable or overly vague question; writing a hypothesis with a prediction but no "because" reasoning tied to real science content.