Some sociologists believe that working class underachievement is due to factors outside the school. Such factors include material deprivation (the inability to afford basic resources, such as adequate housing, food and heating) and cultural deprivation (deficiencies in home and family backgrounds, such as inadequate socialisation, inadequate language skills and inappropriate attitudes/values). In addition, cultural capital (Knowledge, language, attitudes and values, and lifestyle) gives the middle-class an inbuilt advantage in a middle-class controlled education system.