In South Africa Education White Paper 6 introduced the establishment of Institutional-Level Support Teams (ILST) at school level to support the learning and teaching process by identifying and addressing learner, teacher and institutional needs. The core priority of these teams is to implement properly co-ordinated learner and teacher support services. This paper therefore explores the effectiveness of the ILSTs in providing support services at Full-Service Schools (FSS). In this article the Rubin, Plovnick and Fry's GRPI model of team effectiveness (1977) was used to explore the effectiveness of the ILSTs in selected schools. By means of focus group interviews, data was generated from two strata, namely ILST members and district officials working directly with FSS. The study was a case study within a qualitative research design. Data was analysed using an inductive analytical framework and a group interpretive data analysis method. The results indicate some efficacy of support provision, but with numerous challenges regarding attention to the desired results, agreement on the standards and expectations, misunderstanding of the boundaries in which ILSTs operate, individual and shared responsibilities, conflict resolution, and effective methods for dealing with conflict.