This is great! Just a few comments: 1. Some clarification on types of schools: “secondary school” (or “high school” in American English) typically refers to grades 9-12. “College” or “university” refer to higher education, after grades 9-12. 2. “I teach at a secondary school the courses of...” is okay, but “I teach history, geography, philosophy, economics, and religion at a secondary school” is more common :) 3. colleges’ <= when the noun is plural and ends in “s”, you should just add ‘ and not ‘s. That is a tricky one 3. “School” and “university” should be capitalized when part of a name Hope this helps!