"Lesson 1..."

Are you trying to call the lessons in a class ...?

Lesson 1 - you could say leson En or leson nimewo EN
Lesson 2 - you could say leson De or leson nimewo De
Lesson 3 - you could say leson Twa or leson nimewo Twa
etc...
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words