Many (not all) kids these days don't WANT to learn from a teacher because they've decided that 'if and when I need to know something, my phone/tablet/device will just tell me the answer'. This leads to them effectively having 0 memorized facts or baseline knowledge. Facts that are a foundation to do more complex things. Imagine not knowing your basic multiplication tables. I've personally tutored several (non Learning Disabled) Grade 8s that can't do basic addition in their heads; oh, but they can sure use a calculator app on their iPod like a boss. And then they promptly forget said thing they looked up. To them, if the fact can't be looked up quickly, it's not worth knowing about. If the fact can be looked up quickly, it's not worth remembering. End result, kids know nothing and can't do complex problems where several concepts need to be used at once.