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 13W'zAnime
Up to EP 13Amagami SS+ plusAnime
Up to EP 1Pom PokoAnime
Up to EP 1Final Fantasy VII: Advent ChildrenAnime
Up to EP 12Gonna be the Twin-Tail!!Anime
Up to EP 1La Maison en Petits CubesAnime
Up to EP 12Castle Town DandelionAnime
Up to EP 12Pastel MemoriesAnime
Up to EP 1Koukyoushihen Eureka Seven: New OrderAnime
Up to EP 1Porco RossoAnime
Up to EP 51The Law of UekiAnime
Up to EP 1Asobi Asobase: Cosplay Contest/To the Future MeAnime