Spool knitting, corking, French knitting or tomboy knitting is a form of knitting that uses a spool and a number of nails to produce a narrow tube of fabric, similar to i-cord. Spool knitting is a traditional way to teach children the basic principles of knitting.
This definition, whilst true, does not take into account the use of Knitting Boards. These boards are in fact French Knitting ‘on the straight’ instead of ‘on the round’ and can be used to produce a piece of flat knitting rather than a tube. The means of using such a board can be found on the Knitting Board Instructions page and, for those who have forgotten how, there is also a page for Bobbin Instructions (spools as Wikipedia defines them).