Haha I actually did that "intensive" weekend course about three years ago when I was just getting into teaching. It gave me a taste for teaching but honestly I had more questions than answers after that "intensive" course. I knew that I had to learn a lot more to be a good teacher.
At least I focused on doing more study so I did a grammar course and then an online one and now doing a masters. That "intensive" weekend is just a taster, more like a scam!
