A school or college where practical instruction is given, especially in the art of teaching; a school in which instruction and practice in teaching are united; a normal school.(noun)
The Century Dictionary (Public Domain)
Use "training-school" in a sentence
"We'll soon have a fine gladiator show to last for three days, no training-school pupils; most of them will be freedmen."
"We are going to study arithmetic and geography until Christmas; then I shall send her adrift to finish her term as pupil-teacher, while I go into a training-school."
"Within two decades virtually every professional baseball umpire was a training-school grad."