Is there a way to force sequential completion of each lesson in the CSF courses before being allowed to move on to the next activity?
Thanks for writing! We unfortunately do not offer a method for teachers to enforce that students complete levels / lessons fully in sequence. Right now, students can move ahead / backwards within a lesson, or onto other lessons, at any time. You could instead mark certan full lessons as hidden, if you want to control what students can work on and slow down pacing - for more info, see https://support.code.org/hc/en-us/articles/115001479372-How-can-I-hide-certain-units-or-lessons-from-my-students-. We hope this helps!
Josh at Code.org