Can anyone tell me How do i complete a lesson from #Backtoschool challenge...Also where it is in the app??

Answer 1

Click on join in your activity feed and complete one lesson per day for 15 days

That's it ;)

Answer 2

Keep learning one lesson daily (from any course) for 15 days

Answer 3

https://code.sololearn.com/WhxS7Gd2NnlF/?ref=app