I remember I had an online interview with two staff, and then had admin tasks after the interview on the same day, like using Microsoft excel and replying an email.
First a written case study - respond to the customer as a Kaplan's employee.
Second mock phone call with one of Kaplan's senior employees who pretend to be a student calling to inquire about one of the preparation courses.
I applied online. I interviewed at Kaplan (Los Angeles, CA) in Jan 2013
Interview
It was quick and got the job within a week. The currently updated the process so it will take longer to get hired. Mine took about a week but now it can take from two to three weeks