The science lessons are short "omake" bonus features originally present on the first two volumes of the original release. Each short lasts around two minutes, and stars super deformed versions of Noriko, Kazumi and the Coach explaining the various scientific aspects of the series.
Up to EP 12The Silver GuardianAnime
Up to EP 2Nisekoi: OVAAnime
Up to EP 9Pandora Hearts OmakeAnime
Up to EP 1Ghost in the Shell: The New MovieAnime
Up to EP 1D.C. I&II P.S.P. Re-AnimatedAnime
Up to EP 1Nausicaä of the Valley of the WindAnime
Up to EP 1Date A Live II: Kurumi Star FestivalAnime
Up to EP 12Genshiken 2Anime
Up to EP 12Jinki: ExtendAnime
Up to EP 13Gunslinger Girl: Il TeatrinoAnime
Up to EP 13D.Gray-man HallowAnime
Up to EP 1Kimi ni Todoke: From Me to You - Unrequited LoveAnime