Below is a great web site with lots of information to help you with your seminar.
here are some of the sections
Assembling Carburetors
Back fires at high speeds
Basic Info
Cap Jet
Carburetor Idle RPM and Idle Air Mixture Adjustment
Carburetor Removal and Disassembly
Carburetors and Carbohydrates
Castings
Casting Threads
Choke Arm and GAV Driver
Choke Driver with Wing Nut
Cleaning Carburetor
Cleaning minor dirt, rust particles or sludge out of Carburetor.
Compensator Jet
Compensator Jet Orfice contains dirt or rust, or is too small.
Compensator Jet Orfice is too large.
Complete List of Component Details
Complete List of Procedures
http://model-a.org/