Here just a few accomodations already tried from other students:

Apartment Flavia :just refubished and amazingly located in the historcal Rio Dei Vetrai

Apartment Marco  : Sunny, a/c in every room, king size bed room, private courtyard, close to pubblic transport.

Hotel Conterie :Characteristic  Hotel. Wi-Fi. Depandance

Hotel LaGare : Modern hotel very well located. Reastaurant and bar.

Murano Palace :  located in two historical buildings, rooms with tipical venetians tissues.

Apartment e Bed And Breakfast Murano