If you don't know how to test a flame sensor you should demand a full refund for your tuition.
I agree. In 1999 I went to chi inst. And 9 months later I didn't know how to read a set of gauges. My employer told me to get my money back. They actually gave it back to me. My teacher was only in the field for 2 years teaching a class full of men(and 1 girl) how to destroy your equipment, scary. They did give us a pretty cool book though.
Glad I'm not the only one that thinks some basic things should be known when a person gets done going to any hvac school. How to test certain components and what they do. Just to much other stuff to learn while the home owner is watching.