processing information using sources and critical reading

in class i leaned about a reading strategy on how to apply initial in order to interact with sources correctly  ,the lecturer  also  taught us on  the basics oh how to understand different types of text elements that are related to each other so that it can be easy for one to understand how to summarize information from a relevant source when paraphrasing 

we also learnt the difference between a fact and opinion .a fact has reliable sources to prove it and it can even be relevant & used for many years to come. an opinion on the other hand, is a mere collection of ideas from an individual and their perception towards certain things

i hope to lean more about facts and opinion because i didn't  understand them