St John's Matriculation Higher Secondary School is a school in Alwarthirunagar which had its beginnings in the early 1980s. The school was founded by D John Ponnudurai.This school is part of IYAP consortium. The school follows Matriculation Syllabus for students between Grade 1 to Grade 10 and Tamil Nadu State Board for grades Eleven and Twelve. It has branches in Porur, Triplicane and a sister school in the name of the Good Shepherd in Alwarthirunagar. The medium of education is English with Tamil, Hindi and French as second languages.

The school has three floors with the top floor being thatched. It has a creche and more classrooms across the street. The competition comes from Balalok, Avichi and A V Meiyappan. The school uses the R K Ground nearby for games and sports.