This is a worksheet that explains the process of teaching your students to cut their own mats for art display. There is no key, but the answers are easily given in the process.
Also, this shows how to teach mat cutting to any grade level using x-acto knives, a ruler, a pencil, and a pre-cut mat template. Students trace the mat template, and cut out a mat, its that easy. The matboard described in the process is known as Economy Matboard available from all nationwide suppliers.
Great way to have matting done as part of each lesson. Teach it once and they do the matting the rest of the year!