Projects matched to 7th grade (ages 12–13) from the library's middle school collection, at the difficulty tier that fits this year. Every one lists its materials, time, cost, safety notes and the variables to control.
148 published projects in this collection
By seventh grade judges expect a trend, not just a winner: several settings of your variable, averaged trials, and a graph that shows the pattern. These projects all produce enough data points to graph — and each states its variables and controls up front.
Each project page carries an at-a-glance panel with a cost estimate, a realistic time estimate, the hazards involved and whether adult supervision is required, so you can check suitability before any materials are bought.
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Preparing for a fair? Read the science fair guide or record your data in the lab.
They are filtered from the library's Middle School collection at the difficulty tier that fits 7th grade. The wider school-level collections are linked under "By school level" on this page.
A clear question, a hypothesis written before testing in if… then… because form, one independent variable with the rest controlled, at least three trials at each setting, and a conclusion that follows the data.
A research question and hypothesis, the independent and dependent variables, the variables to hold constant, a full materials list with costs, numbered steps, safety guidance and a data table you can fill in as you test.
It varies, so every project page states a cost estimate and a realistic time estimate up front. You can rule a project in or out before buying anything.
Some do. Every project lists its hazards and whether adult supervision is required in an at-a-glance panel on its page, so you can check suitability before you start.