My tutor asked me to look for government policies and reports on supporting special needs students. Where should I look?
You are right in that Google will give you too many results and many of them will not be relevant to your search.
You do not specify whether you are looking for recent legislation or want historical material but to begin with, but a good starting point is our LibGuide on Official publications available at http://libguides.ioe.ac.uk/officialpublications which gives lots of information and advice on this type of publication and how to find it.
This guide suggests you look at the Digital Education Resource Archive (DERA) which hosts government documents that have been published digitally, including many that are no longer available on the Internet.
DERA includes material right up to date, but you will also want to look at the Department of Education website (Schools, colleges and children's services) https://www.gov.uk/topic/schools-colleges-childrens-services/support-for-children-young-people which includes the code of practice.
If you are looking for books, journal articles, reports etc, go to UCL Explore which will show you the material (print and electronic) available in the UCL Institute of Education collections, including DERA.
For journal articles and conference papers, we would suggest that you search in the databases which index the articles - try British Education Index or ERIC to start off with. They can be accessed at http://libguides.ioe.ac.uk/databases. You will need your UCL username and password to access electronic resources (search the databases and download the full text articles). Do make sure you refine your search by date, geographic location etc. otherwise you may be inundated with search results. There is lots of searching help in our Searching for Resources LibGuide.