I made my classroom curtains the same way Vanna did!
They look great & have lasted several years. I also bought some grosgrain ribbon, tied it in a bow, and safety pinned two bows to the curtain at the top, on each side. I think the no-sew stuff is called "stitch witchery" (that's the brand I had, anyway).
A friend of mine also bought white curtains, then made a valance with the children by laying clear contact paper on a table. The children added pieces of colored tissue paper & other things (I can't remember what else). When it was done, she laid another sheet of clear contact over that (to seal it), then she cut a scalloped edge. The children's valance went across the window at the top, then the curtain hung at the sides of it. It may not sound that great, but it was really cute and looked nice.