Top wo Nerae! Kagaku Kouza                                
                                
                                    Aim for the Top! Science Lesson                                
                            
                            
                            
                                
                                    
                                        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...                                    
 
                                 
                                
                                    
                                        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)