The current event scheduling setup allows for a predefined selection of meeting durations. Lots of flexibility for events up to 2 hours, but above 2 hours it becomes less granular.

For some teaching purposes, it would be nice to have half-hour durations above 2 hours: 2,5 - 3,5 - 4,5 hours. Maybe event the option on each Simplero Account, to set up the desired list of meeting durations available in the drop-down list for that account.