I did the threading and the hopi candle course, although i understand you need to do case studys on the threading because you need to pick up the nac of holding and using thread properly, but could not see point in case studys for hopi candles, i came with my daughter in law to do both courses and a couple of days later she returned to do an eye tinting course, which she did and got her certifcate straight away no case studys , dont make any sence to me. but as for the whole exeiperence i would have to rate it as a 10 out of 10 very good, and the lady we had teach us (kirsiy i believe ) she was amazing