For teaching about philosophy of biology, the best resource is the
Stanford Encyclopedia of Philosophy
— immensely useful for preparing lectures and building bibiliographies (and see Roberta Millstein's
resource
for a useful selection of its phil-bio articles).
For contrasting approaches and gleaning great material, searching for "syllabus in philosophy of biology" or "syllabus in history of biology" kicks up a diversity of syllabi to work from.
Other useful summaries are: