John Maestri, of King Edward’s Road, Chatham, had the official title “master of discipline” while at the St Benedict’s junior school in Ealing
He was jailed for 30 months in December 2003 after admitting three counts of indecently assaulting schoolboys under 16 between 1980 and 1984.
He signed the sex offenders’ register for life and was disqualified from working with children.
In June 2005 he was given a community rehabilitation order for indecently assaulting a boy under 14 between 1982 and 1983.
And in January 2009, when yet more victims emerged, he was convicted of indecently assaulting a boy under 14 between 1979 and 1981.
He was given a two-year prison term suspended for two years.