Before looking at any source evidence consider Elton's advice:
"The historian must certainly make one initial choice, of main area of study... But after that... he becomes the servant of his evidence of which he will, or should, ask no specific questions until he has absorbed what it says... He opens his mind to the evidence both passively (listening) and actively (asking)."(1)
(1) G.R. Elton, The Practice of History. (London: Fontana Press, 1987), 83.
"The historian must certainly make one initial choice, of main area of study... But after that... he becomes the servant of his evidence of which he will, or should, ask no specific questions until he has absorbed what it says... He opens his mind to the evidence both passively (listening) and actively (asking)."(1)
(1) G.R. Elton, The Practice of History. (London: Fontana Press, 1987), 83.
Other useful sources in relation to equal pay and teachers could include information about the Burnham Committee and the National Union of Teachers website. A selection of photographs, posters and documents about the fight for equality from the 19th Century to today can be found on the Union History's website.