We practiced chords in the key of Dm: Dm, Gm, A7 (pg 23)
I do hope you got some little bit if insight from our harmony writing exercise. Remember to look first for the harmony note in the chord (there may be more than one note that will work so decide which one you like the sound of best). When the melody note is outside of the the chord look for a note that harmonized with the melody note (maybe the 3rd, or 5th, or ???). Another song that would be good practice for writing a harmony is Drink to Me Only with Thine Eyes in Book 2 (pg 33), Next week we'll look at how to easily find some harmony intervals on the fretboard.
For Next Week also practice To See Swainson, chords, Uke I and Uke II