The Churches Of Blacktown In Schools Inc. (COBIS) is a not-for-profit fundraising organisation that places Christian workers in Blacktown City public high schools. 

Our goal is to increase the number of workers and the number of schools we cover.

Currently, COBIS has a presence in

• Blacktown Girls High

• Seven Hills High

• Doonside Technology High

• Evans High

• Mitchell High

• Wyndham College

COBIS receives no government funding and exists only through the generosity of its supporters.