Joke Collection Website - Public benefit messages - Is it better to contact the teacher by texting or calling?

Is it better to contact the teacher by texting or calling?

If you are familiar with the teacher, you can choose to call directly when the teacher is not at work. If you are unfamiliar with the teacher, you'd better send a text message to explain the situation first. If you are a university teacher, you'd better send an email first, send some materials, and call again after the teacher doesn't reply to you in a few days.