I drew its external anatomy before the dissection. I got marked on the actual presentation of my dissection of which I did well.
Once I finished the dissection I drew the internal anatomy. After the dissection I looked at the differences between earthworms and lug worm (this was mainly based on the external anatomy). I then had a live earthworm and had to describe the way in which the worm moves.
the latter part of this was harder than imagined.