teacher leyla bravo-willey also grew up poor, long before kipp began, yet she graduated from harvard. but she teaches self-control these days, sharing her own adult economic struggles with her students. >> you know that miss bravo has some issues with shopping. i like to shop and i'm trying to save money. so if, for instance, i come across a store i like a lot, then i will pretend that store has bed bugs, yeah then i don't go in. >> reporter: now, do you really visualize bed bugs in a store that attracts you or that's just playing for the kids? >> no, actually, i really actually do. whatever your marshmallow test is there are always strategies that can help you. and we want to arm our kids with all the tools possible to be successful in life. >> reporter: tools that even the most recalcitrant can apparently learn. >> but me wait! >> reporter: paul solman in new york, and reasonably self- controlled, for the pbs newshour. >> ifill: we close tonight with other fundamental questions being asked in the wake of the paris attacks about the cartoons themselves. where could or even should be