reporter: in this classroom and classrooms across denver something is happened that has people like vance perplexed. district results. >> he runs a nonprofit citizen's group focused on improving schools and for years, the progress made in classrooms across denver has been in question. >> in the past we have been very critical of the district in terms of the rate of progress. >> the schools in the bottom 20% of the district are in the middle of the state average. >> go check this word. >> considering all of the challenges in denver, he says that's amazing. >> in th have made some great progress. in fact more progress than almost any other district than we have seen nationally or here in colorado. >> i like how his eyes are on me. >> jessica says the difference is in individual attention. >> we teach to every student where they are at. >> she says technology and team teaching is essential. >> we have to collaborate to are at. >> and they want to know more. >> we are interested in trying to understand the mechanisms, how it has happened. >> how quick change has happened in classrooms across denver. >>