Both special and gifted education calls for curriculum differentiation to cater for high student diversity in every classroom. Multiple intelligences theory and Bloom's taxonomy of cognitive processes were integrated by the researcher and a colleague as a tool for curriculum differentiation. A formative evaluation was made of teachers' use of the MI/Bloom matrix for learning centres, over eighteen months in two primary schools. A different cohort of teachers classified 42 learning activities by the main intelligence engaged (using MI theory) and the level of Bloom's taxonomy. The school-based findings showed the teachers perceived the MI/Bloom matrix as a practical tool for programming for student diversity. Extensive triangulation of data was provided by teacher and principal questionnaires, staff focus group discussions, teacher interviews, collaborative school questionnaires, school brochure analysis and a field diary. The teachers perceived that MI theory provided a framework for curriculum planning which enabled them (i) to cater for different student strengths and (ii) to develop their students' awareness of how they learn and respect for classmates' learning strengths. The teachers perceived that Bloom's taxonomy helped them (i) to challenge all of their students' thinking and (ii) to plan learning activities that ranged from simple to complex thinking processes. The classification strand findings showed mean levels for intercoder reliability coefficients for each independent typology as well as the integrated MI/Bloom model which exceeded the 90 percent level of acceptability. The high consistency in teachers' use of key terms and constructs to order activities supported the logical organisation of the matrix and offered pragmatic validity for the model. The research findings indicate the MI/Bloom model offers potential as a useful tool for curriculum differentiation in any primary classroom. Complex structural and cultural conditions in each school influenced how different teachers utilised the model for school reform.