Clive started secondary school in Cambridge, but continued in Nottingham, where his family moved after the war. Here two teachers encouraged Granger's interest in physics and applied mathematics. He had anticipated following the convention of completing schooling at age 16 to enter the workforce and saw himself working in a bank or insurance company. However, positive social influence from his peers and support from his father led him to enroll in sixth-form for two years as preparation for a university degree.