The Monitorial System or Madras System was an education method that became popular on a global scale during the early 19th century.
 This method was also known as "mutual instruction" or the "Bell-Lancaster method" after the British educators Dr Andrew Bell and Joseph Lancaster who both independently developed it.
 The method was based on the abler pupils being used as 'helpers' to the teacher, passing on the information they had learned to other students.
The Helicopter doctor case (Norwegian: "Helikopterlege-saken") was a case of child sexual abuse in Norway that received broad media attention from 2010 to 2012.
 A physician from Hamar, Thor Aage Mathisen (born 1972), was arrested in October 2010 and charged with sexually abusing several underage girls, including 7 cases of rape, and of blackmailing a number of men.
 At the time, he worked as a consultant at Innlandet Hospital and worked part-time as a helicopter doctor.
 He thus became known in the media as "the helicopter doctor."
 In 2011 he was convicted by Hedmarken District Court and again by Eidsivating Court of Appeal to 10 years preventive detention, to pay his victims 2,4 million NOK and deprived of his medical authorization ("struck off") on an indefinite basis.
 In March 2012 the Supreme Court of Norway rejected to hear his appeal.
 He now serves his sentence in the high security Ila Detention and Security Prison outside Oslo.
Saint John Bosco (Italian: "Giovanni Melchiorre Bosco" ; 16 August 181531 January 1888), popularly known as Don Bosco ] , was an Italian Roman Catholic priest, educator and writer of the 19th century.
 While working in Turin, where the population suffered many of the effects of industrialization and urbanization, he dedicated his life to the betterment and education of street children, juvenile delinquents, and other disadvantaged youth.
 He developed teaching methods based on love rather than punishment, a method that became known as the Salesian Preventive System.
In numerical linear algebra, the Gauss–Seidel method, also known as the Liebmann method or the method of successive displacement, is an iterative method used to solve a linear system of equations.
 It is named after the German mathematicians Carl Friedrich Gauss and Philipp Ludwig von Seidel, and is similar to the Jacobi method.
 Though it can be applied to any matrix with non-zero elements on the diagonals, convergence is only guaranteed if the matrix is either diagonally dominant, or symmetric and positive definite.
 It was only mentioned in a private letter from Gauss to his student Gerling in 1823.
 A publication was not delivered before 1874 by Seidel.
Association of Salesian Cooperators (ASC) is the movement of laity of the Salesian Family of Don Bosco.
 It is also one of the three main branches of the Salesian Family founded directly by Don Bosco in 1876.
 The movement was created with the purpose to share the ideals of the Salesian Preventive System in the education of young people, especially those who are poorest, without the need to be a priest or a lay religious.
 According to a 2005's census, there are 26,703 persons affiliated to this movement around the world.
Don Bosco School, located in an Alaknanda, New Delhi, India, is an all-boys English medium school imparting education from Kindergarten (Pre-Primary) through 12th grade with a campus spanning 10.37 acres.
 Established at its current site in as early as 1980, it is run by the one and a half century old organisation The Order of the Salesians of Don Bosco.
 It is affiliated to the Central Board of Secondary Education, New Delhi, and the teaching methods adopted include the Salesian Preventive System, by doctrine of Don Bosco's methods and rated one of the world's best and most challenging school systems ever.
William Horatio Bates (December 23, 1860 – July 10, 1931) was an American physician who practiced ophthalmology and developed what became known as the Bates Method for better eyesight, an educational method intended to improve vision by undoing a supposed habitual strain to see.
 The efficacy of the method is questionable, and his theory that the eye does not focus by changing the power of the lens, but rather by elongating the eyeball, through use of the extraocular oblique muscles, was contradicted by mainstream ophthalmology and optometry of his day and still is today.
Salesian Preventive System is the educative method developed by the Salesians upon the pedagogical experience of Saint John Bosco with poor youngsters in 19th century Turin.
 It is based on three pillars: reason, religion and loving-kindness.
 Even if Don Bosco appears as the main representative of this method of education and formation of the young, other characters have contributed to its previous development like Philip Neri and Francis de Sales.
 It is also opposed to what Don Bosco refers to in education as the Repressive System of Education.
Blessed Eusebia Palomino Yenes (15 December 1899 – 10 February 1935) was a Spanish Roman Catholic professed religious and a professed member from the Salesian Sisters of Don Bosco.
 Palomino worked as a domestic in her adolescence having withdrawn from her education in order to support her parents though she later worked with the Salesian Sisters before she began the process of becoming a religious of that order in the 1920s; she afterwards continued most of the same duties and became known for her devotion to the five wounds of Jesus Christ and to the Via Crucis.
Dominic Savio (Italian: "Domenico Savio" ; April 2, 1842 – March 9, 1857) was an Italian adolescent student of Saint John Bosco.
 He was studying to be a priest when he became ill and died at the age of 14, possibly from pleurisy.

Question: Who was a student of the developer of a method that became known as the Salesian Preventive System?
Answer: Dominic Savio