extending training to develop more specialised subject content knowledge will also be necessary as outlined above it runs schools in low to middleincome neighbourhoods in santiago endowed with a similar level of resources as other private subsidised schools sip schools achieve systematically higher simce test scores with much lower variance and this is robust to controlling for socioeconomic background in fact sip schools performance is close to that of private feebased schools which serve highincome students with much larger resources as a result of their high fees there is a selection process for entry based on parent interviews although not ability tests a centralised pedagogical department develops tests for all sip schools to systematically evaluate pupils progress