The fourth core principle of effective training is – The training must be repetitive, remember to cement in change it takes repetition

To truly cement in the skill or to take the skill to the level you determine is necessary, repeat the same exact training – you may have to do this several times if the skill is complex or if you want to make a significant change – until the level of proficiency you want is reached.

Source: Chet Holmes, The Ultimate Sales Machine

Soon after each training module you should hold a workshop on the skill. This will help you know the level of comprehension and retention of your trainees. Take note of the individuals that are excelling and those who are not. Try to find out what the most proficient people are doing that the others are not. Then have the proficient one’s hold another workshop and impart their techniques.

Come at the trainees from as many directions and in as many manners as to can to keep up the momentum of the original training. Remember always if you want to make a skill permanent, it takes repetition, testing and reinforcement.