Most students have heard that they should evaluate their sources. Very few have practiced doing it on a real claim they care about. The Da Vinci Code hands teachers a claim worth testing, right on the opening page.

The book states that its descriptions of art, architecture, documents, and rituals are accurate. Students can take that statement and check it against outside sources. Along the way they learn how to judge who knows what, who has a reason to persuade, and how to cite what they find.

This lesson is different from a full research paper. It focuses on the process of evaluating and citing sources, and it can be done in a few class periods with short written products.

The outline below shows how to structure the lesson and grade it.

A Simple Framework for Judging Sources

Give students a short checklist to apply to each source. It should be quick enough to use every time and specific enough to reveal real differences in quality. Have them score two or three sources on the same claim and compare notes.

• Who wrote this, and what expertise or experience do they have?
• Who published it, and what is the publisher's purpose?
• What evidence does the source offer, and can it be checked?
• Is the information current, and does it agree with other reliable sources?
• Does the source try to inform, sell, or persuade?

Practice Citing Accurately

Citation is a habit that students pick up through repetition. Ask them to cite the novel, a museum page, and a scholarly article on the same claim, using the style your school requires. Comparing the three formats side by side shows how different sources are handled.

Grade the citations as their own piece. Small errors are common, so be clear about which ones matter and which are minor.

Write a Short Evaluation Memo

The written product can be a one-page memo. Students choose one claim from the novel, present their best sources, and explain which they trust most and why. The memo format keeps it short and gives you something easy to score.

Look for reasoning, not just conclusions. A student who trusts a museum website because it cites primary evidence shows real thinking. A student who trusts it because it looks official does not yet.

Grading Source Use Efficiently

Source evaluation memos contain a lot to check: the quality of reasoning, the accuracy of citations, and the fit between claim and evidence. A rubric with three rows covers it well. Tools such as GraideMind can apply that rubric to each memo and flag places where a source is cited without any explanation of why it is reliable.

You can then spend your time on the harder task of discussing credibility with students. That conversation is where the lesson really lands.