Top wo Nerae! Kagaku Kouza
English title: Gunbuster! Science Lesson
Japanese title: トップをねらえ！科学講座
Alternative titles: Aim for the Top! Science Lesson, Gunbuster! Science Course, Top wo Nerae! Kagakukouza
Type: Special
Source: Original
Episodes: 6
Status: Finished Airing
Aired: Oct 7, 1988 to Sep 18, 1995
Duration: 2 min per ep
Rating: G - All Ages
Studios: Gainax
Licensors: Discotek Media
Genres: Comedy, Sci-Fi
Themes: Mecha

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. 

(Source: Wikipedia)