What are the percent influencers of a classroom’s family income and the percent influencers of a classroom’s mildly/moderately disabled students on the overall expected classroom achievement?

"Not as much as most claim – it is less the resources than the psychological enablers – high expectations and encouragement outweigh resources. I am writing a book on Visible Learning for Parenting (but struggling as I am not overly academese in writing but fun trying) and the message is the power of parents to support psychological resourcing of kids. Building confidence, enjoy struggle of trying, see errors as opportunities to learn, putting in effort, high levels of trust, listening and enjoying the process of learning” (John Hattie, personal communication, September 22, 2016).