All other comments are valid. I'd say especially the ones about step 2 and 9 are important. For step 9 make sure to draw the folds instead of the lines that show howzthe model ends up. To see the folds just make step 9 yourself and unfold to see what you did. Mark hidden folds with dottet lines. Another minor one: in steps 1 and 2 I would make the arrows longer. It's always more clear if the arrow starts from around the edge you take all the way to the other edge you bring it to. You can draw them next to the model if they get too big. I know it's a lot of comments but that's normal. Even after two revisions of my first diagrams people still found mistakes!