Throughout the course you will need to sit a series of assessments. For the Online AAT Level 2 and 3 Qualification there will be four unit assessments and a final synoptic assessment. The assessments are computer based and you will need to attend an examination centre which is approved by the AAT. These are located throughout the country. The four unit assessments can be taken anytime during the year but the synoptic tests are only available at certain intervals throughout the year.