andrea biography collegeteachers cross-culturalstudies developingcountries education education(higher) educationalequalization effectiveteaching groupworkineducation gruppenarbeit history interactionanalysisineducation italy literacy mannucci observation(educationalmethod) peoplewithsocialdisabilities professionalrelationships schoolmanagementandorganization socialjustice teachereffectiveness teachers tuscany unitedstates universitàdifirenze unterrichtserfolg