The word-length minimum per entry is 150words.
so you have to write 20 journals (150word per each) about some topics
here are some examples.
An important decision.
Teacher experiences. when did a teacher help you? hinder you?
pass/fail versus the A-F grading system.
An informal letter conveying a response to a significant incident
A review of an article, play, opera, movie, concert.
If you could come up with other topics it will be fine.