YOU SAID:
new in school teacher is old
INTO JAPANESE
学校の先生は新しいです
BACK INTO ENGLISH
The school teacher is new
INTO JAPANESE
学校の先生は新しい
BACK INTO ENGLISH
School teacher is new
INTO JAPANESE
学校の先生は新しい
BACK INTO ENGLISH
School teacher is new
That didn't even make that much sense in English.