MAAO 2020 Winter School: The MAAO 2020 Winter School is online and available for registration. To see the courses and locations, expand the Calendar by clicking "more" (next to CALENDAR). We are offering our entire compliment of classes by all must have a minimum of 15 student in or to run. MAAO members, please be sure to sign in to the website in order to receive member pricing while registering. All questions to be directed to the MAAO staff.