adjective
[ usually before noun ] with or for students who have different levels of ability :
a mixed-ability class
mixed-ability teaching
adjective
[ usually before noun ] with or for students who have different levels of ability :
a mixed-ability class
mixed-ability teaching
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005