Kassia Omohundro Wedekind, A math teacher made a article about how I-ready is dangerous for students, to hear this from a teacher is both fassinating and surprisng. I dont know what we will replace I-ready with, but if its as dangerous as she says i will defend her claim. 

Copy and paste this link to read her article:https://mathexchanges.wordpress.com/2018/06/14/why-iready-is-dangerous/