Mahou Sensei Negima!: Mou Hitotsu no Sekai

This is a series of OVAs covering some of the Magic World manga arc by Ken Akamatsu, starting with chapters 184 through 188. 10-year old Negi Springfield is a wizard-in-training, and needs only to pass one more test in order to become a Master Wizard. Unfortunately, his final task is a bizarre one- to become a English teacher at an all-females boarding school. As soon as he arrives, he completely embarasses one of his students, Asuna Kagurazaka, and replaces the teacher… more 10-year old Negi Springfield is a wizard-in-training, and needs only to pass one more test in order to become a Master Wizard.