Notes on Grammar etc
Parts 1-3 have notes on Grammar and Phrases. Parts 4 onward - less than half way through the course - don't have notes. Why? Notes would be really helpful as the course becomes more demanding.
Why doesn’t my Duolingo French chapters match the list of topics/chapters you referred to? Also, my wife just started learning French and her chapters are different from my mine. Why the difference?
A/B tests for new users / who add the French course the first time to their account.
With 78 skills you are on the stable tree.
Have you joined any schools classroom or registered as a teacher?
There are four different trees (different skill/lesson count) and six different A/B tests going on as tree8+12 are splitted into two subgroups, one is the normal version, another has the section grouping.