MeL Class Descriptions Hands-on training in the Michigan eLibrary (MeL) Databases is available for library staff in the state of Michigan free of charge. Classes are offered in locations throughout the state. Because all classes are hands-on, active learning, host libraries need to provide a computer lab with Internet connection for each participant and a projector for the instructor's station. Minimum class size is 8; maximum class size is 20. Libraries may combine staff to schedule classes.