I hard my gambling mentor set the wagering number and amount to bet on that have steadily won in dice and place games.So a say dice skills are possible with the right instructor.
Steadily won? Well I doubt that especially if the game is dice.
In my case dice is the first game I play online when im just a newbie, and became really hook to it because its easy to play and not complicated. However there's no such thing as consistent winning in dice regardless of what strategy you use. Dice is more on luck and instructor is not really necessary since you can study it alone and set a strategy that somehow can be useful.
Most likely the person that calls himself his instructor is someone that is using the martingale strategy, if your bet is very small and the capital is high this can give the impression that you have a winning system as eventually you are bound to get your money back plus the size of your bet, for newbies this could give the impression of a winning system, but we know that sooner or later this is going to change and eventually the instructor is going to lose all their money like it is the case for all of those that try to use the martingale strategy.