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 1C³ - CubexCursedxCurious - Outdoor School ConfusionAnime
Up to EP 3Phantom The AnimationAnime
Up to EP 1Exorcism Chronicles: The BeginningAnime
Up to EP 1Godzilla: Planet of the MonstersAnime
Up to EP 1Sayonara Zetsubou Sensei Jo: Zetsubou Shoujo SenshuuAnime
Up to EP 1Fairy Tail the Movie: The Phoenix Priestess - The First MorningAnime
Up to EP 1Tenchi Muyou!: Galaxy Police Mihoshi Space AdventureAnime
Up to EP 1Love Live! School Idol Project OVAAnime
Up to EP 1Boruto: Naruto the Movie - The Day Naruto Became HokageAnime
Up to EP 1Is It Wrong to Try to Pick Up Girls in a Dungeon?: Is It Wrong to Expect a Hot Spring in a Dungeon?Anime
Up to EP 1Yawara!: Zutto Kimi no Koto ga...Anime
Up to EP 1Steins;Gate: Egoistic PoriomaniaAnime