Crocheting in Public

Yesterday, my friend/student and I spent 2 hours crocheting in the library. Currently I am teaching her Tunisian, she wants to create a shawl in Homespun, similar to one I'm currently making. She has learned the Tunisian Simple Stitch (aka TSS & Basic Afghan stitch BAS), the Tunisian Knit and Tunisian Purl. She is currently practing a swatch which uses all the stitches, and looks at how they look with several rows of TSS, followed by several rows of knit, then a section of alternating knit and purl rows. She works very precisely and this piece, in orchid, is beautiful. She currently has about a 5 x 7 swatch. I think she plans to continue until it's 7 x 9, and then donate the rectangle to Warm Up America. I recently dropped off about 40 rectangles made by my students and me.
We then reviewed the pattern for a diagonal box stitch. She just finished a triangular shawl with this stitch, but needed help getting the next one started. This is a little tricky to get started, and doesn't help when you're using Homespun.
But, she got it started and finished about 4 rows.