It works like this: Every Tuesday an embroidery stitch is given out, e.g. Chain Stitch. The participants then have a week to make use of the stitch, either to learn it if it is new (there are easy to follow instructions in Sharon's stitch directory), or to let the imagination flow and create something. Then, if you want to, you publish your result on your own blog and leave a link in Sharon's comment box to announce to other participants what you have created.
I first read about TAST in someone's blog and thought it would be interesting to take part. It has not only been interesting, but fun, educational and enormously rewarding to get to know so many other people who share my love of needlework.