Corrector, a web interface for practice session with immediate feedback Rapport A/377/CRI

Corrector is a client-server web application which provides immediate feedback to students during practice sessions by automatically validating the proposed answers. The teacher needs only focus on solving comprehension problems with clever explanations. Corrector is especially well fitted to help teaching SQL, the language used in relational database systems. Indeed, some questions admit many equivalent SQL queries as valid answers. The automatic correction solves this issue by comparing the result of the student query execution to the result of a reference query. Other correction modes are available that deal with modifying data contents or structures, use cryptographic