altschool also says it encrypts all the data, which is retained on secure servers.ark eisner is the father of eighth grader emma. one of the ways personalization is possible is by collecting a lot of information about your daughter and the other kids here. how do you feel about that? >> i feel fine about it. they do need to collect information and data to make good decisions, and i think that's fine. i mean, it's all oriented toward teaching and, you know, refining the overall educational model that they are trying to do. >> reporter: since opening in 2013, altschool says its students have scored above national averages in standardized tests but declined to share any scores. a report last year from the gates foundation and the rand corporation looked at 11,000 students in 62 schools with the personalized learning approach. it found those students "made gains in mathematics and reading that were significantly greate"" than their peers in regular schools. for example, during the past two school years, they gained 11 percentile points in math tests. larry cuban is a fo