担任

1. Origins, structure, and basic meaning

• Structure: 担任 is read as たんにん and can mean “homeroom teacher” or “homeroom assignment”, depending on context.
• Basic usage: The examples show consulting a homeroom teacher and taking charge of a first-grade class.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • As a noun it denotes a homeroom teacher or assignment; in クラスを担任する it describes taking responsibility for a class.