text: advantages and disadvantages of mixed-ability classes? i need to write an essay on mixed-ability classes in secondary school. pls give as much info as possible i found some articles and studies on the subject.  mixed ability classes reduce individual performance http://www.warwick.ac.uk/res2003/media/fertig.html  success of mixed ability classes depends on what you teach http://ioewebserver.ioe.ac.uk/ioe/cms/get.asp?cid=4578&4578_0=3424  "in secondary schools, students’ experiences of ability grouping similarly suggests that setting in mathematics has a negative effect on both attainment and motivation, with the exception of slightly improved attainment for top set pupils." http://www.standards.dfes.gov.uk/research/themes/pupil_grouping/  “tell me with whom you’re learning, and i’ll tell you what you’ve learned: mixed ability versus same-ability grouping in mathematics ”  http://www.mste.uiuc.edu/courses/ci399atgfa02/folders/mstoraasli/ci399_article_2.htm