Teachers are generally clueless about teaching problematic students and for good reason: it's not their job! Most learning problems derive from inadequate early parenting which affects the development of those basic ego capacities which govern control of behavior, development of a sense of self, mood modulation, and others. Limitations in these are exacerbated by parents who didn't read to and then with their toddlers, who bossed them around rather than explaining "why" which depresses the development of the capacity for abstract thinking, and who didn't foster individual development and demand civil behavior. All else is window dressing, like the computer technology which is expected to alleviate these early life failings but can't. Thus do teachers take the rap for being unable to "re-parent," which is basically not their job and a vastly complicated business too.