You can create classes to receive more detailed information about the results of your classes. You'll see the percentage of how many of your students got it right for EACH question so that you can evaluate your students' skills and where their strengths and weaknesses lie.
To create classes just got to "Home" in your account and click on "Edit your participation". You'll arrive at your schools' participation. At the top you can find the button "Edit your list of participating classes" where you can enter every name of each class. Please make sure to edit the level to the right one otherwise your students will see the contest for a wrong level. When you're ready click on "Save Classes".