Watch the JAM: Triads and Seventh Chords 2 online guitar lesson by Susan Mazer from Hands On Guitar: Beyond Beginner
This tune uses a new strum and different chords from the last tune. Sometimes, the strumming pattern is split between two chords. Take one measure and practice it over and over until the strumming pattern is solid. Then, practice the chords separately from the strum using only a down strum per chord. Once you know the chord shapes without looking at your chart, you can put the two together.