QCM is a package for making multiple choices questionnaires ("QCM" is the corresponding French acronym) under LaTeX2e. A special environment allows you to define questions and possible answers. You can specify which answers are correct and which are not. QCM not only formats the questions for you, but also generates a "form" (a grid that your students will have to fill in), and a "mask" (the same grid, only with correct answers properly checked in). You can then print the mask on a slide and correct the questionnaires more easily by superimposing the mask on top of students' forms. QCM can also typeset exams corrections automatically, and comes with support for AUC-TeX. The author is Didier Verna.