Are there any coin grading classes/ programs

Recently I check the ANA grading course:For the ANA SCHOOL OF NUMISMATICS DIPLOMA PROGRAM You only pay about $500 , they will send you the material to you ,and you can take correspondence courses. But for ANA Summer Seminar you have to go there. For the tuition and lodging will cost you over $1500 for one week ( Grading coin 1 then another one more week move to Grading coin 2)
Is there anyone have experience about this two program , I just want to improve the grading skill ,Will the ANA SCHOOL OF NUMISMATICS DIPLOMA PROGRAM helps to improve your actual grading skill? Since I am just a little bit wonder , if the ANA DIPLOMA PROGRAM can improve your skill , why people want to spend more money to take the ANA Summer Seminar?
I appreciate your help!

 

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I answered your question in anther thread you started with it.

 

Thank you so much for your valuable information! I really appreciate it !

 

Well, my title is a little different. But, I wrote exactly the book you are looking for. PM sent, to avoid spamming/advertising rules.