quilt shops are required to have each student purchase their own pattern/book to teach out of one- that has to do with copyright rules- but to teach a technique---without someone's book or pattern is permissable-
you can teach someone to make logcabin blocks-or pineapples (as example) but you can not use someone's pattern/book to teach the technique without the (student) having their own copy of the written material (clear as mud?)
so -- you can teach techniques- if you can do it without using someone elses (instructions)