Are halogens a further classification of non-metals, or are they another group themselves? [closed]

I've searched many pages in the internet, and many just classify halogens (Grp 7A) as non-metals. However, my teacher classified them as another group in the periodic table, and when asked which groups are classified under non-metals, she written the correct answer to be group 3A-6A. I'm very confused as I thought non-metals include halogens?

• You thought right. – Ivan Neretin Aug 16 '17 at 9:50
• @IvanNeretin So halogens are non-metals and are not another group? – Charlotte Aug 16 '17 at 9:58
• That's right. There is no another group. Non-metals include every element which is not a metal. – Ivan Neretin Aug 16 '17 at 10:07