Instruments and mixed dentition

So today we talked about our instruments and learned how to distinguish between them, what to use them for and when they are used. I felt good about this, it all made sense to me and it was easy to see the diff. However, earlier in class we looked at a picture of mixed dentition and we were suppose to be able to chart it. Which were primary or deciduose and also, what numbers or letters they were. Yeah, this I don't know. But since I have WAY too much to focus on for now, I will just worry about it when it comes up in my P.E. or on a test. Until then, I can't stress about it. Some things come easy and I am able to remember them well, and somethings, even though I have learned and read about them, for some reason, will NOT stay put in my storage space in my brain. Those things I have to go over and over and over and over until I feel confident it is stored in my brain for good. I passed off my explorer P.E. and it went well, Professor Costley taught me some good tricks in determining which end to use. My goal for wednesday is to get ahead!!!!!!!! I feel so much better when I am atleast ONE P.E. ahead of the due date.