If you want to check schools when you buy a house. Here we have 2 nice website in Ontario Canada:

1: To find the school that serves your residential address for REGULAR PROGRAMS:

Toronto District School Board –   Find Your School

2: Compare schools, or check school rank:

FRASER – a free and prosperous world through choice, markets and responsibility

Shool Performance, this page is for Ontario

3: A Chinese site connect to MLS and report nice information, but it is in Chinese.