How Can I Tell If My Prospective CDL Training School Is A Good One Or Not?

It is certainly extremely difficult to choose a good, respectable CDL Training School to enroll in, especially if there is just a great deal of them out there. And since the internet came along, falling prey to some mom- and - pop training operation is just too easy, as there are just too many of them to count. So, how do we weed out the scams from the good, reputable, and real training schools?