[3] In 1939, Kashem obtained his Matriculation Examination from Boroma Trahi Menka High School with first class and Government district scholarship.

He completed his master's thesis under the supervision of the famous mathematician and physicist Satyendra Nath Bose.

On 1 September 1947 he founded the Pakistan Tamaddun Majlish as a non-political cultural organisation to mobilise students, intellectuals and the people in general for the Bengali language.

[5] This booklet also strongly advocated for Bengali as the medium of education, court language and for its use in the offices in East Pakistan.

Also his untiring efforts let to the formation of the first Rashtrabhasa Sangram Parishad (State Language Committee of Action) on 1 October 1947 with Nurul Huq Bhuiyan as the convener and he himself as the treasurer.

Khawaja Nazimuddin gave a written assurance to the Action Committee that he would do the needful to introduce Bengali as one of the state language of Pakistan.

Kashem actively participated in organising a countrywide strike on 11 March 1948, to press for the language demand.

A prolific writer, Kashem authored nearly 100 books including textbooks on science for postgraduate student and on education, Islam, culture and politics.