While I was taking my first Botanical Illustration Course, the opportunity came up to take a free course through edx.org called Drawing Nature, Science and Culture and pay a small fee and get a certificate of completion - provided I complete it in their very strict time frame.
This was an excellent course and really gave me a great workout in graphite! I loved this course and it is still available for free.
Here is a portrait of our very first family bunny that I did for this course...
You can see how I created Peter's portrait HERE
And here is my final piece of work from this course...
And you can follow along with the making of this Lumpy Pumpkin HERE