Dear Tee, It is not compulsory to take up science in class 11, as criminology involves the study of various forms of crime, the reasons working behind an incidence of crime, and its consequences. If you are planning for a Bachelors degree in criminology, then you must have completed your higher secondary schooling in Arts or Science. To known more details about the career in Criminology log on to, career.webindia123.com/career/options/law_socialscience/criminology/intro.htm