With CodeHS Pro you can now turn on access controls for individual students.
If you are interested in setting Access Controls for an individual student click on the section. Click on Assignments at the top of the page. From there click on the unit and lesson, once all assignments are listed click edit next to the assignment you want to set access controls for. Scroll to the bottom of the page where you see Configure Student and click on the correct section. You can then set access controls on a per student level.
Access Controls allow you to set the visibility of assignments for students in this section. A Locked assignment cannot be accessed by students, while Available assignments can. If you set the visibility to Scheduled or choose a start or end availability date/time, then those assignments will only be available during the specified time range. Set modules, lessons, and assignments to locked or scheduled to control when your students have access to them.