Part of the problem with some instructors today is that they are given/awarded Teaching Certificates automaticly with a rank promotion. A student should be given an evaluation or test to obtain a teaching certificate. The teaching certificate is in two parts, 1) an instructors certificate, 2) a rank examiners certificate. Some instructors are very good at instructing but do not know how to properly evaluate students during a test. Most stopped this practice and started awarding/givening out teaching certificates automaticly with rank. The reason being two fold, 1) the seniors didn't know themselves, 2) the belief that you automaticly knew everything with higher ranking. The teaching certification should be done free of charge. To ensure that you will have a continuing high quality system you must maintain a high quality, highly educated instructors staff.