>Those tech companies could just be after what they see is money and not be based on any science (as it’s often the case)... Well, that's true. I guess I just

>Those tech companies could just be after what they see is money and not be based on any science (as it’s often the case)... Well, that's true. I guess I just assumed people would be doing all this in step with some theory or principles of child development that indicated that this would be effective? Maybe I'm giving way too much credit.