Three reminders were given to students of Clementi Town Secondary School to remove their books from underneath their desks.
All but six Secondary 3 classes complied.
The school then acted - it collected the textbooks of those who ignored the reminders and put them in black garbage bags.
Some students saw red over this issue and took to Twitter to voice their frustrations.
However, the school's principal, Mrs Grace Chua, clarified that the confiscated books were not disposed of, but were left in a room for the students to collect.