This paper critically considers teacher education in Northern Ireland and the Republic of Ireland. It was stimulated by an exchange programme between student teachers from Northern Ireland and the Republic of Ireland for a period of school-based work in each other's jurisdictions. It examines recent curricular developments, partnership with schools, college requirements and cultural diversity. It also contrasts the effects these have had on student teacher preparation, classroom delivery and tutor involvement in student teacher development. The highly prescribed and assessed Northern Ireland curriculum will be contrasted with that of the Republic of Ireland, which appears to offer more in terms of freedom, flexibility and independence in planning. Different supervisory practices and responsibilities for the assessment of student teachers' practical teaching will be compared in both jurisdictions. The tutors in the Republic of Ireland exercise more control over student teachers' preparation and professional development for teaching, while in Northern Ireland the partnership arrangements have given more influence to schools. The paper illuminates the shift of locus of control and influence of Colleges of Education in Northern Ireland in the education of student teachers, while in the Republic of Ireland Colleges of Education have retained their influence. The curricular expertise of supervisors in the Republic of Ireland is recognized and accepted by the schools, while in Northern Ireland the rise in significance of curriculum expertise in the Curriculum Advisory and Support Service (CASS) of the Education and Library Boards has undermined the influence and expertise of college tutors.