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To ask the Secretary of State for Education, what the average cost was to a (a) school and (b) local authority of employing a (i) teacher and (ii) classroom assistant in the most recent period for which figures are available; and what estimate she has made of such costs in (A) 2016-17, (B) 2017-18, (C) 2018-19 and (D) 2019-20.

" . "2017-01-17+00:00"^^ . . "60334" . "Schools: Staff" . "http://data.parliament.uk/writtenparliamentaryquestion/commons/2016-17/60334" . . . . . . . .