Thank you for asking, GC, sincerely. Let's see if people will respond respectfully or harshly to my "bio" below. (Gulp!)
My grandfather was avid and bought a home table after WWII and taught me billiards, ping pong and darts. (I used to wake my grandparents at 7 AM to the sound of ball returns in the basement). Grandpa was a second father and crafted a regulation ping pong top for his pool table. He was wonderful. Unfortunately as a self-taught "genius" my books were Mosconi and Fats standing almost erect in their shot photos. Not the best models!
I was lucky to play at great halls like Julien's in New York as a kid and on a VERY strong ACUI squad here in Florida during university. I played a little with Dave Uwate who won the national championship (yes, just like Bob) and even he was defeated at the local college level multiple times before running endless racks of Nine Ball at locals and regionals--that's how strong the players were here then. Hundreds of dollars would be gambled every night at school and there were dozens of really strong players here--and then shortstops and hustlers would come to thin the herd!
Back then, "The Color of Money" had just revived pool, and I found myself in a busy room in college with 16 nine-footers, a full Snooker table and a full Cushion Billiards table--I mean there must have been 30-40 regulars who were shooting pool until 2 AM some nights instead of hitting the books--and started giving lessons.
People hate when I say this, but I purposely did not get certified by SPF or BCA, etc. -- that was and is still my choice -- because SOME of my methods for teaching are non-standard. Dr. Dave said about me (paraphrase) I get to the same place, I just use different concepts.
What have I acheived? My proudest pool achievement is . . . my average student goes up two handicap points in one two-hour lesson only. They start killing it and win their matches and six weeks after our lesson their handicap increases (that's a shamless plug, I get paid well when I give paid lessons, and sometimes people pay my flights, per diems and hotels, too). I can explain more about why they improve that fast, but it's going to generate more controversy.

I'm a controversy machine, what can I say? I'm out-of-the-box in other subjects, not just pool!
I have instructed all pool levels as singles and groups from "Which end of the cue stick do I hit with?" to pro. My signature line shows some of my work at the bottom of this email. I have written hundreds of pool instruction and pool culture articles, in print and online. I've done trick shot clinics with friends like Mike Massey--who told me I amazed him by creating trick shots he'd never seen before--if that's not an achievement . . . haha.
Any teacher should play competently, of course. I'd like Fran to take my challenge, because she and others have said negative things about my play from articles and photos, and I'd post a video here if I thought they'd actually watch it.
Good pool people stick together, I’ve collaborated with Ronny Park, Tim “The Monk” Miller, Donny Lutz, Tony Robles, Dom Esposito, Allan P. Sand, Tom Kennedy, Max Eberle, Mike Massey, Dom “The Drill Instructor” Esposito, Nancy Cote, Tom “Dr. Cue” Rossman, Tom Simpson, Steve Lillis, Jason “The Michigan Kid” Lynch, Neil Johnson, Doug “Pool Tables 101” Walters, Ted Mauro, Ken Tewksbury . . . but most of these stay off/stayed off AZ because of the toxicity from some who are legendary forum trolls!
"To whom it may concern...
I have witnessed Matt Sherman teach billiards (pool) and have found him to present instructional information in a foundationally sound and pleasant manner...creating a healthy bonding process with his students.
I would encourage anyone wanting to tune his or her game to take a lesson from this player-friendly instructor.
Tom "Dr. Cue" Rossman"
PS. NEVER play Dr. Cue in a wing shot contest, he will own you! He likes to start each of our play sessions that way.