For educators
Designed for introductory database and data-modeling instruction. This three-round activity helps learners translate natural-language business rules into minimum and maximum cardinality using Crow’s Foot notation. It progresses from unary relationships to binary relationships and concludes with a bridge entity representing a three-way business fact.
- Runs as one self-contained HTML file in a modern browser.
- Works for individual practice, pairs, small groups, or classroom projection.
- Uses immediate explanatory feedback rather than scoring.
- Stores no responses and uses no external scripts or services.