Ally

...someone who wants to learn but doesn't have anyone to buddy with...or the class has an odd number of students...who does the lone dive student learn with...will the instructor make sure that everyone takes turns with each other or will the lone diver be with the instructor all of the time?

Scuba Mama

Depends on the class. If I am faced with this case, I usually have help. My assistant then becomes the buddy. If not, I will buddy with the odd diver. In most cases, the odd diver out gets one on one training and usually finds it easier.