As a fellow teacher, I feel your pain! I fancied this holiday, but knowing of Monarch's reputation, I decided against it!
Have you considered Apulia? I had a triffic time there in 2011 and am very likely to return this Summer. It's a lovely, largely undiscovered area of Italy, with great trips. I fell in love with Apulia!
I would also recommend the Austrian Lakes holiday which has an August date. Very restful and breathtaking scenery!
Having decided against a JY holiday this Summer (because of the limited choice and 2 family weddings), I really felt the loss of it all this term! So mya advice is to try and grab a holiday - and I'm not on commission!