The Question Method of Legal Research Interactive Legal Research Modules
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Chapter 4 · Educational

The Types of Secondary Sources

Secondary sources are your map of the legal landscape. They don’t decide your case, but they orient you, explain a doctrine, and hand you citations to the primary authority that does. The skill is knowing which one to reach for — and that depends on the question you’re holding.

How to use this: click any source to read what it does. Then use the Sort by menu to regroup the list by the question each answers, by how its coverage runs, and by how much persuasive weight it carries. Finish with the two-part check at the bottom.

Knowledge check · part 1 of 2

Place each source by depth and breadth

Depth of treatment × breadth of coverage

Tap a source, then tap the cell where it belongs — broad-and-shallow up at the left, narrow-and-deep down at the right. Prefer menus? Use “Place with menus instead” below. When you’re ready, reveal the model placement.

Sources to place
Breadth of coverage

Knowledge check · part 2 of 2

Sort each source into a persuasiveness band

How much persuasive weight?

Every secondary source is persuasive only — none of them binds a court. This sorts them by relative weight. Tap a source, then tap a band (or use the menus). Then reveal the model bands.

Sources to sort

Least

Moderate

Strong