Complex sentence: A school annexe with laboratories known as Brookside, was built in 1963 and became the location for Sixth Form Science and after expansion, the entire grammar school was moved to the new site in 1967.
Split into simpler sentences: A school annexe with laboratories known as Brookside, was built in 1963 and became the location for Sixth Form Science. After expansion, the entire grammar school was moved to the new site in 1967.