At the beginning , St. Peters college comprised only 33 students and 3 teachers. 1926 became a land mark since the college, comprised of more than 400 students under the guidance of the head master of the school Muhandiram F. Valentine Wijerathne. Gradually the number of students increased up to 506 while the number of teachers was 14 in 1957. Presently the college comprises from grade 1-13 consisting more than 73 classes. Science, Maths, Arts and commerce streams are available for Advanced level students while conducting both Sinhala and English medium. Electronic and Computer science have become more popular subjects in the college.