Complex sentence: Glenn attended the schools of the Atlantic City School District and later he attended Georgetown University in 1921 and 1922 and graduated from Dickinson School of Law in Carlisle, Pennsylvania in 1924.
Split into simpler sentences: Glenn attended the schools of the Atlantic City School District. For college, he attended Georgetown University in 1921 and 1922 and graduated from Dickinson School of Law in Carlisle, Pennsylvania in 1924.