Keep each module separate
When a course contains multiple modules, the easiest way to stay organized is to finish the current module lessons and related assessment before moving to the next one.
Use progress tracking
Resume from the last unfinished lesson, keep study resources attached to the correct chapter and use the module assessment as a checkpoint. If an assessment is not passed, revise the same module before moving forward.
This creates a clear learning path and avoids repeating already completed work.