Standard tuning consists of the following notes E-A-d-g-b-e‘ and each chord requires a different grip of the left hand. Adults playing gradually improves from LEVEL I and II to LEVEL III.
If an open C tuning is used with the strings tuned to C-G-c-g-c‘-e‘, the chords simply only require a simple barré fingering. For minor chords damp the thinnest plastic string.
Children in nursery schools like to play C guitars, because normal chord fingering isn't possible at this age. Using LEVEL II or III, children ensembles play on two or more guitars. Several simple Capos produce the desired chords.
Children at primary and secondary schools either play with normally tuned guitars at basic LEVEL or with C guitars at a more advanced LEVEL. Keyboards or orchestral instruments complement the guitars in many ways.