For POLS course The electron shells and orbitals section has three videos and one text file. Take notes on these as your pre-class assignment.

For POLS course The elements and atoms section has four links: two are videos and two are text files.  Take notes on these as your pre-class assignment.

For Principles of Living Systems The Intro to Biology section of Khan Academy has six assignments (three in "Welcome to biology" and three in "The science of biology").  Take notes on these six assignments.