Searching for great learning pieces for young and old? Dragons and Dinosaurs by Reba Lunsford is a great choice. Her explanation of placing is very good:
“Putting the fingers on the strings before playing the first note. Notes are grouped in a series of two, three, or four. It produces better sound and enables more secure, accurate, and faster playing.”
Download a free page from the book – Orbs in the Darkness Glowing Orbs in Darkness free page