teach someone something

One night I taught my brother, Garrison, to tie a loop knot, it was the easiest thing I could think of. My brother was also the one in my family who didn't know how to tie that type of knot, which is why I chose him. The lesson took long if you know how easy it is to tie a knot, and Garrison was to thank for that, as he didn't really catch on 'til the end. Overall, the lesson took about 15 minutes.