Pandurang Sadashiv Sane (Marathi: पांडुरंग सदाशिव साने Marathi pronunciation: [paɳɖurəŋɡə səd̪aʃiwə sane] 24 December 1899 – 11 June 1950), also known as Sane Guruji (Guruji meaning respected teacher ) by his students and followers, was a Marathi author, teacher, social activist and freedom fighter from Maharashtra, India. He is referred to as the National Teacher of India. Wikipedia