         &lt;p&gt;          To avoid having to register each student of your school yourself, you need to create a &quot;group&quot; for each set of students that will participate at the same time, and the same level. Please read the content of the explanations tab before creating any group.          &lt;/p&gt;          &lt;p&gt;          &lt;b&gt;Warning:&lt;/b&gt; the rows that have a red background are groups that have already been used at least once. Remember that a group can only be used for 30mn after the first time it is used.          &lt;/p&gt;