Students working on semester-long projects in international teams, such as the European Project Semester programme at the Ingeniørhøjskolen i København – University College (IHK), face many challenges, not the least of which is communication between different cultures. The supervisor pays a key role in supporting a project team and monitoring its effectiveness. One of the key tools employed is a self and peer review assessment, undertaken twice by each team member during the semester. The assessment considers the quantity and quality of the contribution made by each team member and their participation in teamworking activities. The supervisor uses the assessment to monitor teamworking and to give constructive feedback and advice where needed. Comparison of the responses from self and peer review assessments was undertaken and the findings are presented. Limited results over a 3 year period were analysed and compared with Autumn 2009 semester results and conclusions drawn.