We pay particular attention to the language, which must be simple but specific. The number of technical words is limited to a strict minimum, and they are defined in an interactive glossary in each course.

Courses are designed to be studied in 30 minutes to one hour. They are divided into chapters, themselves sub-divided into sections. Each section is made of a few pages, each page consists of a short text and a visual aid – a photo or a cartoon. Ideally, one simple concept is covered by one page. A page also contains navigation buttons for within-section navigation, but a navigation panel is always available and allows chapter- or course-level navigation (see screenshots).


Each section ends with a short formative test which helps students verify their learning. An erroneous response results in the question being asked again and a chance to review the material if so desired.