Tips for Trainers / Facilitators

Bring water or another liquid to class. Talking more or less continuously can leave you parched well before the end of a two-hour class.
Determine and communicate up front how you'd like questions to be communicated: as they come up or at specific points you designate, such as "okay, any questions on..."
Remember to describe what you're doing, especially when asking trainees to follow along on their own computer as you talk. If they're simply following along, the redundancy helps reinforce memory.
If you give barcode examples on handouts for trainees, format them for easy reading. 32044 barcodes are easier to read as they appear on physical barcodes: 32044 123 456 789.
To make the facilitator's job workable, usher trainees to the front of the room. Workstations in the very back of a room should be reserved for facilitators. Back-of-room workstations are challenging to support.