Call me Teacher with と呼べ

Grammar Explanation: Quoting and reporting with と and って

Sanae’s teacher, Mr. Tanabe, has proposed to her older sister, who is also a teacher at the school.

「次(つぎ)の日(ひ)。」; “The following day.”
サナエ:: 「おはよーございます、ニーサン。」; “Good morning, Big Brother.”
田辺(たなべ):: 「学校(がっこう)では先生(せんせい)と呼(よ)べ、月本(つきもと)…」; “Call me 'Teacher' at school, Tsukimoto.”; Literal: “At school, call me Teacher, Tsukimoto...”

Key Points

1先生(せんせい)と呼(よ)べ = call me “Teacher”

Here と marks the title being quoted: 先生(せんせい) is what Tanabe says Sanae should call him.
呼(よ)ぶ means “to call someone”; with と, it works like “call someone X”.

2The command form 呼(よ)べ

3学校(がっこう)では limits the rule to school

学校(がっこう)では means “at school” and sets the context for the command.
The は adds contrast: whatever she calls him elsewhere, at school he wants the proper title 先生(せんせい).

次 (Next): 次(つぎ) is the next one in order.
日 (Day): 日(ひ) is a day. It also means the sun or sunlight.
学校 (School): 学校(がっこう) means a school, where teachers provide organized instruction to students.
先生 (Teacher): 先生(せんせい) is a respectful title for teachers and certain professionals, including doctors, lawyers, and politicians. Speakers do not normally use it for themselves.
呼ぶ (To call): 呼(よ)ぶ is to call out to someone, call someone over, or call something by a name.