We are working on Section 18.2 in the reference reading. You have a study Guide for that Unit too to work through on your own.
I collected all the Tests! Looking good
I issued almost all of Unit E Ecology to you: the Reference Reading, the Unit E Ecology Study Guide, and a couple initial assignments. (just in case the poop hits the fan next week). So that takes us to the end of the course almost; after a couple more days of lessons and discussions.