There is training involved and most want at least a 1 year commitment (really want at least a 1 case commitment). My first case took about 18 months and the second will be about 2 years.
My organization (each CASA has a different organization) also has positions for tutors and that doesn’t have the same commitment. Last summer I did a 2 week stint at summer school. Really, I was a playground monitor and made a lot of calls to the families, but it was defined as ‘teaching.’
It wasn’t clear from the OP if these new grads were willing (hoping?) to relocate or trying to find stuff to do for short term.