An essential principle of IB assessment is that standards are the same worldwide.
The assessment model is criterion-referenced in order to maintain the rigor for which the IB is renowned. Teachers are responsible for structuring varied and valid assessment tasks, based on the assessment criteria defined by the IB, which will allow students to demonstrate achievement according to the required objectives within each subject group.
The IB, in line with modern research recognises that a good curriculum will develop a range of student skills. The IB encourages teachers to assess this acquired skill set, including exam performance. Typically, these assessment tasks include open-ended, problem-solving activities and investigations, organised debates, tests and examinations, hands-on experimentation, analysis and reflection. In all cases, the assessment is carried out internally by teachers, according to the criteria defined by the IB.