I realize that this comment reflects the teacher in me. The real question: Do they want to learn to quilt or do they want to make a quilt? If they want to make a quilt (in the time available) then select a pattern that is straight line sewing and joining that requires no points or special combinations. That gives the opportunity to do 1/4 inch seams (and is very forgiving) pressing, sandwiching and simple straight line quilting. A very simple binding technique would be to bring the backing fabric to the front and stitch it down. Now, if the goal is to 'learn to quilt' perhaps a sampler type quilt is in order. Provide them with a book with lots of techniques and squares using those techniques. If buying books is too costly, make one of your own by downloading information that is readily available on the internet. Have them construct small quilts, sandwich them (don't forget Elmer's school glue) quilt in a simple manner and teach them to bind in the traditional manner. This is a n opportunity for fun and fellowship sans frustration. Meet them 'where they are' and whet their appetites for a life-long passion. It sounds like you already have it.