These are very basic orchestra instrument fingering charts. They're a helpful visual aid for both young and mature beginners.
Beginning students are usually oriented to their instrument one string, or note, at a time. It's amazing to see how something "clicks" when they see the basic layout of all of the strings with the musical alphabet/fingering/open string correlation.
In addition to the fingering chart, I provide students with a large print reference of the line and space notes appropriate for their clef.
Students who have difficulty processing note reading, or transferring pitch identification to their instrument, greatly benefit from this easy to read large print fingering chart.
First, I introduce the musical alphabet, "A B C D E F G". Next, I show them how it relates to the open strings as they add fingers to raise the pitch. For example, for violin, “the first open string is ‘G’…add one finger and it’s ‘A’…add another and it’s ‘B’…one more makes it ‘C’…which brings us to open “D”…and so on. The student continues saying the note names as the silently finger the notes with their left hand on the instrument (or play pizzicato).
It's simple, it makes the content accessible to all students, and once kids get "it" they're able to process the sheet music with greater ease.