Thanks a lot. I agree with you about worksheet.I would call it a handout. Here a "worksheet" is a handout that requires the student to complete some type of written assignment - math problems, for example, or English grammar exercises.
A handout is any paper with information that supports the lesson - it can be text, or images, or both. Handouts include worksheets. But not all handouts are worksheets.
Perhaps I should have said can get through your letter-box.I'd say pamphlet describes the form of a document (whether it comes in one's mailbox or otherwise); handout describes its method of distribution. In this case, based on post 3, it seems we're talking about handouts. In general, a handout could be a pamphlet, but these single-sheet handouts are not pamphlets.
But a "hand out" would cover any document (in this context) you handed out. It is an all inclusive term. Are you assigning a specific function for this?In all of the classes I have been to, and in all the classes I have taught (not language classes - aviation physiology and such like), sheets of printed paper given to the students which contained information relevant to the taught subject-matter were called "handouts". If it was a sheet for answering questions or for doing calculations then, as stated by joanvillafane and others, it would have been a "worksheet".
The great advantage of a detailed handout (for the student) is that if the teacher is really boring and the student is sitting at the back of the room it's possible to have a nice nap and miss nothing important.