Good opportunity to add my 'tupenth" worth.
I have done 3 courses, one with a Joker who had me and another man stood all day polishing a 3-4 sqm floor (Floor Academy) Not Recommended, learnt sod all.
Then, I did Kev,s course and felt that, that was 100% better than the waste of money with the first course. I would recommend that course to anyone who wants to get started in floor renovation work.
Then, I had a moment of complete madness. I parted with a lot of money with the Tile Doctor course. Complete waste of time and money. Learnt sod all and worst of all, it costs you £100/month to be part of the "Tile Doctor Team". They still use some of my photos on the Tile Doctor website and despite emails reminding them that NO TILE DOCTOR PRODUCTS were used to do certain jobs of theirs, the images still remain...What does that tell you?
I cannot believe that there are people who are paying to be part of the Tile Doctor, I found that their cleaning products simply did not work.
So, my advice is, stay away from The Tile Doctor, unless you have more money than sense, do Kev's course and if at all possible, get on a job with someone who does the work day in day out. Classroom environments are ok, but nothing beats the hands on experiance.
Just my opinion, hope it helps