I replied to their ad on a job search site and got a call back from them the next day asking me to come in and talk to them. They did not arrange a formal interview or conduct a phone interview aside from asking me briefly about my resume. I went to see them at a later date and we discussed my qualifications and what the job would be like. Instead of a traditional interview, I was asked to take a math placement test that included concepts from elementary to high school math. Some of the questions involved some strategic algebraic thinking, while others were very basic. When I finished, they reviewed the questions I missed with me and gave me a chance to explain my thinking (or to point out a silly mistake). Having performed acceptably, I was immediately given employment forms to fill out and asked to start the next day.