Complex sentence: The school has retained its name but is now a comprehensive school, originally under the grammar school system, pupils who failed their 11 plus exam would have attended Wetherby Secondary Modern School (now Wetherby High School).
Split into simpler sentences: The school has retained its name but is now a comprehensive school. Originally under the grammar school system, pupils who failed their 11 plus exam would have attended Wetherby Secondary Modern School (now Wetherby High School).