Since "Mastering Regular Expressions" by Jeffrey Friedl is wildly recognized as a very good resource on regular expressions (and I found it a very good read too), I'd closely follow the example-driven approach used in that book, and use some examples that are relevant for your colleagues.

Perl 6 - second systems done right

In reply to Re: Teaching Regular Expression Pattern Matching by moritz
in thread Teaching Regular Expression Pattern Matching by Jim

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