Though the National Curriculum makes most subjects compulsory, gendered subject choices can still come through, e.g. in design technology, girls will choose the food tech option and boys will choose the graphics option
Gendered subject choices are more noticeable at AS/A-level because pupils have more choice, with boys opting for maths/physics and girls opting for sociology/English/languages
Science is seen as a boys' subject because most teachers are men, textbook examples and resources draw on boys' interests, and boys monopolise on lab equipment
Computer studies is seen as a male subject because it works with machines (part of the male gender domain) and tasks are abstract, while girls prefer group work
Subject choice can be influenced by peer pressure, and pupils will make it clear if they disapprove of a subject choice, e.g. boys dropping out of music as it's out of their gender domain and attract negative peer reports
Vocational course subject choices are also affected by social class, with working-class students picking courses like beauty as it's part of their working-class habitus and what they can expect of 'people like us'