Ki-Control Swordsmanship School
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
After Son Gohan wrote Groundbreaking Science in 804 Age, a great interest in channeling ki into swords began spreading around the world, thus Goten and Trunks decided that opening this school would be a way to educate the people of Planet Earth in proper fighting procedure. In 820 Age, remnants of Freeza's Force attacked Planet Earth and the Ki-Control Swordsmanship School aided in the struggle against them.
It is currently unknown who instructs the school in 1000 Age.