Pearson Edexcel International AS/A levels (IAL) use the popular and flexible modular approach* which means exams are taken at the end of each unit of study, or throughout the programme of study when a student feels prepared and ready, or all together at the end of the course. This flexibility, together with exam series in January, June and October, for most subjects, means that students have more opportunities to get feedback to improve their performance and get the grade they need to progress.