NEW! We have installed a Moodle plugin called Scheduler! 
The Scheduler is available through the “Add an activity or resource” link and helps you to schedule one-on-one appointments with all your students. You specify the periods during which you are available to see the students and the length of each appointment. The students then book themselves into one of the available timeslots. Scheduler also lets you record the attendance and grade the appointment. This plugin is new to us so we are still learning about all of the options, but we wanted to make it available ASAP. If you have questions, contact the Help Desk or check out the official Moodle help documentation.