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 1Busou Shoujo Machiavellianism: Doki! "Goken-darake" no Ian RyokouAnime
Up to EP 3Nisekoi OVAAnime
Up to EP 25Pandora HeartsAnime
Up to EP 10Ghost in the Shell: Arise - Alternative ArchitectureAnime
Up to EP 13D.C.II S.S.: Da Capo II Second SeasonAnime
Up to EP 1Castle in the SkyAnime
Up to EP 10Date A Live IIAnime
Up to EP 3Genshiken OVAAnime
Up to EP 49Glitter Force Doki DokiAnime
Up to EP 13Gunslinger GirlAnime
Up to EP 103D.Gray-manAnime
Up to EP 25Kimi ni Todoke: From Me to YouAnime