IMHO, the sidebar which shows curriculam parts and lessons is a bit confusing. When you click on a section/part of curriculam, the lessons belonging to that section/parts are shown. I would suggest to have a top heading which shows what's the current part the user is looking at.
I got a bit confused while moving from part 1 to part 2 as part 1's name is a bit similar to part2's first lesson. This might not be issue for all but I thought it would be better reporting it.
IMHO, the sidebar which shows curriculam parts and lessons is a bit confusing. When you click on a section/part of curriculam, the lessons belonging to that section/parts are shown. I would suggest to have a top heading which shows what's the current part the user is looking at.
I got a bit confused while moving from part 1 to part 2 as part 1's name is a bit similar to part2's first lesson. This might not be issue for all but I thought it would be better reporting it.