45 minutes will not give you time for everything you want to do.
Question and answer could take 15 minutes. Tasting could take 15 minutes because there will be comments you should field. Making JAO from pre-prepared components could take 10 minutes.
Given the short amount of time, I would suggest the following:
1. Handouts that provide a level of detail beyond what will be covered in the class and references/links for follow-up.
2. Agenda
a) Basic explanation of fermentation - yeast ferment sugars/honey and give off CO2 and alcohol
b) Simple discussion of yeasts and differences - beer, wine, champaigne
c) Simple recipe - Use JAO, have fine mead recipe as well, discuss quick mead versus fine mead recipe differences, what would change in JAO if you were shooting for a fine mead?
d) Very basic sanitation - use your JAO components as examples, it should not scare them
e) Mixing your must - use JAO assembly process, discuss briefly use of heat and chemicals to pasteurize, mention JAO does neither, introduce SG here and how you measure it, discuss sweet, semi-sweet, and dry, amount of honey/SG used for each
f) Traps - use JAO set-up for example, briefly discuss oxidation
g) Ageing - Quick discussion on quick meads versus fine meads, bulk vs. bottled.
h) Racking - How it is done, when it is done, potential pitfalls, what lees is
i) Bottling - Corks, corkers, screwtops
If you only spend 2 or 3 minutes on each topic, you have about 30 minutes. This is why a handout is important.
Combine the tasting with the question and answer for the last 15 minutes. Introduce the samples then have someone else pass them out while you field questions.
Good luck and have fun!