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 1The Mystic Archives of Dantalian: IbarahimeAnime
Up to EP 1Tokyo Ghoul: "Pinto"Anime
Up to EP 1A Certain Scientific Railgun OVA: Since Misaka-san is the Center of Attention Right Now...Anime
Up to EP 1UtsunomikoAnime
Up to EP 2Honey and Clover SpecialsAnime
Up to EP 1Aikatsu Stars! MovieAnime
Up to EP 12Ground Control to Psychoelectric GirlAnime
Up to EP 12Aoki Hagane no Arpeggio: Ars NovaAnime
Up to EP 51Rockman.EXE AxessAnime
Up to EP 22The Girl DownstairsAnime
Up to EP 12Scorching Ping Pong GirlsAnime
Up to EP 12Dragon Crisis!Anime