I really think the interior angle pattern is important and fun to teach. I used an extra long piece of paper. This is a standard note taking strategy for my classroom. I can expand the space for note taking from one page to three by simply folding a piece of paper in half. I have also discover a trick: have students glue in most all notes as a pocket that opens to the spine (so papers will not fall out). This not only provides additional space, it also conserves glue.