2.1 Displacement and velocity
Videos from Khan Academy:
Don't be intimidated just because it looks all "mathy", he explains everything.
Chapter labs:
Section 2.1 - Time interval of free fall
Section 2.2 - Modern Galileo experiment
Section 2.3 - Determining g on an inclined plane
Chapter lab: Free-Fall Acceleration
Chapter homework:
5 thru 11;
14 thru 25;
26 thru 32.