生徒

1. Origins, structure, and basic meaning

• Structure: 生徒 is read as せいと and is a noun for a student or pupil receiving instruction in a school or classroom.
• Basic usage: Use 生徒たち for students as a group and 生徒一人ひとり to emphasize each student separately.

2. Common pitfalls and similar expressions

• Group and each individual
  • たち groups the students together, while 一人ひとり stresses that every student is considered individually.
• Teacher and student roles
  • Students are the actors opening the windows, but in the question example 先生 answers and 生徒 identifies whose questions they are.