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 6The Silver Guardian 2Anime
Up to EP 166InuYashaAnime
Up to EP 12MEKAKUCITY ACTORSAnime
Up to EP 1Ghost in the Shell: Stand Alone Complex - Solid State SocietyAnime
Up to EP 13D.C.III: Da Capo IIIAnime
Up to EP 1Porco RossoAnime
Up to EP 1Date A Live Movie: Mayuri JudgmentAnime
Up to EP 1Genshiken Nidaime OVAAnime
Up to EP 50Akage no AnneAnime
Up to EP 2Gunslinger Girl: Il Teatrino OVAAnime
Up to EP 12Deadman WonderlandAnime
Up to EP 12Kimi ni Todoke: From Me to You Season 2Anime