When writing an article summary i have to say if i agree with, disagree with, or qualify the main points,

what does qualifying the main points mean?

http://www.answers.com/topic/qualify

Definition #1.

Let me know if you still have questions.

so if i was to qualify a topic in the article, in this case would i be saying why i couldn't say that i agreed or disagreed

In a way, yes ... by describing exactly why ... explaining/describing what it is about each of the main points that makes you agree or disagree.

And I imagine that you need to write an all-agreeing or an all-disagreeing response. No "fence-sitting"!!

with one of the topics i fully agree,but with a completely different topic i cant agree with because i feel that the journalist was too vague when he wrote it.

So ... to point up the vagueness, what will you do?

do i say why i think it is vague?

or explain what he could have done so that it would have been more clear?

I would ask questions, very pointed questions that point out what the author DIDN'T write. Those omitted details and/or facts are what make it all vague.

Ask lots of questions!!

okay thank you.

You're welcome! =)