What shipped.

Public lessons you can put into practice

Every free sample lesson now includes a topic-specific exercise, an expandable understanding check, and a concise takeaway. The additions turn short excerpts into useful standalone learning without requiring an account or pretending that sample reading counts as enrollment.

• The practice material is original to each subject rather than generic text added for search engines.
• Public samples remain the only pages eligible for Google-served advertising, and private or utility screens remain excluded.