Changing strings in one song.
It is necessary that you learn the note positions on the violin for all strings.
This way you will keep up with reading the scores as they become more and more complex.
So, if needed, skip back to page 8 to refresh your reading skills.
Nr. 12-14 handle a few string changing exercises, after that you can play (a simplified version of) “Amazing Grace”, (nr. 15).
Downloads of pages and backing-tracks are the black buttons below the video.