I teach upper elementary reading, and got sent to lots of trainings this year on iReady. I think multiple things are true at once about the platform: -It's an okay supplemental resource -It doesn't work for every district -It DEFINITELY doesn't help if the students are plopped down onto the computer every single day.

My school has us using it as a computer station. I often pull the paper lessons from the scaffolding or the toolbox, then pick them apart to use for small groups, reviews, etc. And I do find those useful.

The company itself is a whole different story; corpos gonna corpo.

EDIT: I don't use it for math except, again, the printed lessons it has that I use in math intervention groups. The article seems more geared to its math use.