I like to have fun when I piece, not fight the fabric. So teaching her accurate cutting (which sounds like you already do) and sewing an accurate 1/4" seam would be my priorities. Taking a few minutes at the beginning to figure out where a 1/4 inch is on her machine, and encouraging her to maintain it will save loads of frustration. Oh, and how to press, not iron, having said all that I would not worry too much if some points don't match!