What is the meaning behind another brick in the wall?

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Tags

1. #cares
2. #school
3. #begin
4. #teacher
5. #about
6. #talks
7. #around
8. #world
9. #insulted
10. #against
11. #after
12. #protest
13. #dreams
14. #teachers
15. #personal
16. #abusive
17. #brick
18. #their
19. #another
20. #being