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>> reporter: after moving here from portugal as a teenager, carvalho was homeless himself in miami, where he would later first his first stint as a superintendent. >> i remember sleeping under the bridges of miami blocks away from the office that ultimately i occupied as superintendent. >> reporter: this is personal for you? >> it's very personal. >> reporter: vanessa struggles with the uncertainty. when you look at yourself five years from now, ten years from now, where do you want to be? >> hopefully out of here very fast. and help my mom out. >> reporter: the family has now moved to more permanent housing, but it is just a first step. >> if you do not create your appropriate environments, if you do not invest sufficiently, we're asking for problems that will be much costlier to address later on. >> reporter: keeping vanessa in high school is key, carvalho says. he hopes the system doesn't let her down. stephanie gosk, nbc news, l.a. and coming up, the