That's four years of different ages, all with different averages and growth rates, so it is too hard to answer, but on average seniors and juniors are almost to pretty much done growing so that would put them at average height 5'9-5'10, in freshmen to sopohmore is a major jump growth period as is 8th and 7th grade, but the average for that time is 5'5 to 5'8 .
On average about 6'0-6'2.
6'2 or 6'3
The motto of Wynberg Boys' High School is 'Supera Moras'.
The motto of Canterbury Boys' High School is 'Truth and Honour'.
The motto of Westcliff High School for Boys is 'By Faith and Fortitude'.
On average about 6'0-6'2.
about 5'4"-5'5"
The average jumping height is 10 feet.(In America)
The average school chair height ranges from 16-18 inches for elementary school students and 18-19 inches for high school students and adults.
The average height of a flag pole is around 58.48089416'
Southland Boys' High School's motto is 'Not for school but for life we are learning'.
Jeppe High School for Boys was created in 1890.
Potchefstroom High School for Boys was created in 1905.
Napier Boys' High School was created in 1872.
Kelston Boys' High School was created in 1963.
Canterbury Boys' High School was created in 1918.
Randwick Boys High School was created in 1883.