Usually you enter a keyword or phrase at 'Google' or other search engines box and within seconds there are million of results. If you are looking for information for educational, scholar, research or relevant purpose then this is very easy tip which you can use and get results from only Government or Educational sites/blogs which are usually non profit and offer reliable information.
Process is very simple.
For example you need some information on 'home schooling'. You just enter .EDU or .GOV before your keyword and just add site or blog after it. It should look like:
.EDU+home schooling+blogs or 'sites'
.Gov+home schooling+site or 'blogs'
You would be surprised to see filtered results from reputable and reliable sites. Your results should not bring sites with affiliate links or fake sale pages.