Dear Mohammed,

B.ed (Bachelor of Education) is a professional degree of two years of duration, which trains you for teaching. If you have choosen any particular teaching subject in your full degree program, then I am sorry to say there is no other option to change the teaching subject. And, if you are still pursuing your degree, then yes there are chances that you can change your teaching subjects, for this you can talk to your respective college management or class teachers/ professors. Or you can contact your university for information or formalities to change your teaching subjects only if you are still pursuing the degree.

Hope this helps.

Good Luck :)