The Cluster Schools Policy?

hi guys, i would need to know the below stuffs about the cluster schools policy. actually this is an assignment, but i really have no idea where to start from. i started searching info about cluster schools but i couldnt find much about it. so hoping you guys can help..

1. why the government formulated the policy

2. the policy objectives

3. the causal theory used and the policy instruments employed

4. the advantages and disadvantages.

or i just need the link to the information, even a single one could help! really urgent!

thanks lots!