I applied online. The process took 3 days. I interviewed at Mathnasium (Oklahoma City, OK) in Nov 2014
Interview
There was a long written math test which takes about two hours, no calculator. The interview itself was not very long or stressful. The management was very kind and provided a good environment to feel comfortable in.
Interview questions [1]
Question 1
How would you explain what a denominator is to a kid who doesn't know much about fractions?