As in the previous lesson practicing these chord in a number of different orders is recommended.
Careful attention to the sound of the tonic (G) to dominant (D7) chord progression is important.
Try and internalise the sound so you can recognise it when it appears in a song.
The dominant to tonic progression is the most important progression in western music and forms the basis of most of the music written up until the end of the 20th century.
Download a printable chord sheet of this lesson here...