Hello,

You haven't specified your query is regarding which entrance exam, usually some of the common areas in BEd entrance exam are language proficiency, teaching aptitude, reasoning, questions pertaining to the group you belong to such as math/bio group or social science/language group , this is just a general idea which I mentioned to you, there can be slight difference as per the exam pattern of university conduting the exam, now coming to study materials, for a strong hold on language proficiency you can always refer a grammar book if your base isn't strong enough, you'll find plenty of mock papers freely available in various competitive exam sites especially banking ones, you can practice them, for reasoning you can refer rk agarwal's verbal and non-verbal reasoning for compeitive exams, for teaching aptitude you can go through arihant publications book , you can always refer NCERT books when it comes to building foundation in any subject, they are the best options written in simple and lucid language, read newspapers on daily basis for improving your english lanaguage as well as remain updated  with latest happening,