My niece is presently student teaching and will graduate at the end of this fall term. As a 33 year veteran of elementary education myself, I am considering giving her the graduation gift of a Cricut Expression Die Cutting Machine. I think it would come in handy with bulletin boards and a lot of other projects in elementary school. I am trying to find any teachers who use this machine for their classroom. I would like to find out which of the Cricut cartridges are the most appropriate for use by teachers. The cartridges are expensive, so I need some advice and directions as to make wise choices. Thanks.