Josh - Thank you for sharing your website and practical program to develop focused vocabulary in natural conversations. I share your conviction that lexis-driven approaches often work best, especially if the goal is authentic communication between adults. I've bookmarked the site.
By the way, your teachers and tutors might be interested in worksheets that I use in my high-intermediate and advanced oral skills courses. Here's the link to the worksheets that also appear in various titles I've co-authored on conversation skills.
Reproducible Worksheets from Compelling Conversations
Again, thank you for sharing your site. If I had a language school, I would certainly consider developing a formal relationship. Alas, I remain a simple university instructor.