Once the teacher assigns the lessons, the student will have several ways to locate and view them online (edusystem.com) or download them (EduSystem Viewer).
Both at the online and local version, you can view the lessons from the Dashboard section, specifically at the Recent Activities, Calendar, or My Courses sections.
You can also view the content through the My Courses section (directly at Assigned Content) and at the Calendar section (at the bubble with the lesson code).