How in depth do you need? I've attended basic separations science courses for ~$1000 USD, and advanced method development courses for ~$1800 USD. These courses are routinely paid for by an employer, who're glad to have a highly trained worker, and are glad to foot the bill, and the vendors know that, and price themselves accordingly. The courses now know they'll have students who are motivated to learn, and students of these sorts of courses can even offer constructive criticism, if they think the course doesn't address their needs.
If you want the general sort of running technique, that can be part of a university course lab exercise, and the very basics can be part of a lecture. There are many, simple courses on the internet in PDF or Powerpoint format.
What can you tell us, about what you need for your students?