- GMA will be conducting new student Introductory Lessons on Sat. June 29th. Email or call 978-433-8772 to make an appointment. These will be the last new students for the summer. - The next date we will be conducting new student Introductory Lessons will be on Saturday, August 31. To begin in September, this is the class you want go to. Email or call 978-433-8772 to make an appointment.