In October 2013, at the London Tester Gathering 2013, I presented a half day workshop on HTTP Proxies and Browser Developer Tools.
I started by throwing people in at the deep end. Mainly so they physically 'feel' the gaps in their knowledge, or can spot areas they want to work on in the workshop.
I explained the basics of HTTP Proxies, with specific reference to Fiddler, Zap and BurpSuite.
We also covered some of the functionality associated with the inbuilt browser tools.
In addition I explained the various layers of modelling I use for Web Sites and technical testing in general.
You can find photos of the event on Tony Bruce's blog.