Where does “sekolah laboratorium” come from?

sekolah laboratorium (Indonesian) comes from Indonesian laboratorium, from Dutch laboratorium, from Medieval Latin laboratorium, from Latin labotatorius, from Latin laborator, from Latin laboratus, from Latin laboro, from Latin labor — fox.

sekolah laboratorium (Indonesian): laboratory school, an elementary or secondary school operated in association with a university, college, or other teacher education institution and used for the training of future teachers, educational experimentation, educational research, and professional development