Interview started with a phone interview and then I was sent a writing assignment. Both were positive experiences. I had a similar experience to many other experiences on Glassdoor, however I do not think that IXL is trying to get "free work" out of their interviews, as this would require more work for them than they would get out if it. They seem to be very selective in their hiring, or they are just waiting for the "perfect match".

Pretty straightforward. The recruiter will call you and ask some pre-screening question then you will be asked to complete a task within a week. The task consists of grammatical correction, alignment and information clarity.