Transhuman wrote:
When I'm walking from one classroom to another at school, there are many females who make prolonged eye contact and smile. Sometimes they make eye contact several times within a short time-frame. Does it mean anything at all, or are they just doing this to be polite? What is the normal reaction supposed to be in this case?
if someone maintains eye contact with you whilst smiling for 3-4 seconds, it can mean they are interested in you, or think you are attracted.
i say if you are interested in them too, especially if they are constantly making eye contact with you in a short timeframe (like if you look away, then look back and they are looking at you

), then GO FOR IT!
go talk to them!