Japanese language tends to omit subject—especially you.
But of course we have the words means I and you. And,there are so many words!
I
♂わたし（formal)。わたしくし.手前。手前ども（very formal)。僕（ぼく）。俺（おれ）。おいら。あっし。
♀わたし。わたくし(formal)。あたし。あたくし。うち。
Ｙｏｕ
あなた。あなた様。お宅。お宅様。あんた。あーた。きみ。お前。おめえ。貴様。
We have so many personal pronouns but we don’t want to say because maybe we feel it’s little bit rude.
Even I.
So,children tend to say <I>in their introduction but adults.
In the school,teacher call student<you>,but other situations.
If you are teacher in Japan or you have Japanese husband,you can use<anata> but others.
Andwe have no idea to mention teacher<sensei>but other way to call—anata is really impossible–even their name+san sound no way.
Please call your teacher’s name ____sensei or just sensei.