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
Back Street Girls: Gokudolls
TV
24m
Dragon Ball Z: Super Android 13!
Movie
45m
Futakoi Alternative
TV
24m
I''s Pure
OVA
27m
Aria the Scarlet Ammo
TV
24m
Katte ni Kaizou
OVA
23m
Mini Van
TV
3m
Renkin San-kyuu Magical? Pokaan Specials
Special
14m
Tenchi Muyou! Ryououki 2nd Season - Special
Special
7m
.hack//roots
TV
24m
Rocket Girls
TV
23m