Please add spaces between words: ByDecember1936shewasforcedtotakesickleavewhichwassupposedtoendinAugust1937sothatshecouldtakeupteachingagainfortheacademicyear1937-38.
By December 1936 she was forced to take sick leave which was supposed to end in August 1937 so that she could take up teaching again for the academic year 1937-38.