GCSE Economics: In the mark schemes, what is the difference between AO1a, AO1b and AO3a, AO3b? OCR Customer Support 04 October 2023 17:02 Updated AO1a refers to knowledge and AO1b to understanding AO3a refers to analysis and AO3b refers to evaluation. Referring them to a and b comes from the Ofqual guidance on the assessment objectives. Related articles GCSE Economics: With regards to exam questions - is the highest mark question 6 marks? GCSE Business: In the mark schemes, what is the difference between AO1a, AO1b and AO3a, AO3b? GCSE Economics: Where can I find exemplar answers? GCSE Economics: Are students required to calculate elasticities? GCSE Economics: In multiple topics it references ‘analyse recent and historical economic data’, whether it be unemployment, economic growth etc. What exactly would the assessment of that skill look like? Comments 0 comments Article is closed for comments.