sketch book and GCSEs

Normally my sketch book has just straight forward drawings that I work on to transfer into images for the pots. At the moment I am working on owls. What I am looking for are shapes that will fit into a landscape shape on the pots. Still got plenty of work to do on that yet.
However, my son has just started his art GCSE. So I thought I would try it myself to encourage him and feed him some ideas.
The first thing he had to do was alter the cover of his sketch book. I've built a sort of box on the front of mine to house one of my keys.
The next subject was leaves. As you can see I've looked at some ideas that don't need a huge amount of drawing skills. It's a long time since I taught what was then O levels and things have changed a lot since then.
Does anyone know of a good web site out there on this sort of thing just maybe mum helping, even at arms length, isn't too cool!