The science lessons are short "omake" bonus features originally present on the first two volumes. 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.
(Source: Wikipedia)+ More
Characters & Voice Actors
Recommended for you
Beanie's Daily
ONA
3m
[RAW] Coji-Coji
TV
25m
Shibai Taroka
OVA
52m
[RAW] Shin Bikkuriman
TV
25m
[RAW] Shin Dokonjou Gaeru
TV
25m
I am THE Shiratori Reiko!
OVA
44m
[RAW] Super Bikkuriman
TV
24m
Super Zugan
TV
25m
Super Secret
ONA
9m
[RAW] Rainbow Sentai Robin
TV
26m
Little Astro Boy
OVA
11m
Star Dust
OVA
32m