"Begin by going to a level you think is most suited to your current GCSE grades. Then answer topic questions to identify areas for improvement. A score of 80%-90% (depending on your choice) or higher signifies successful completion of the topic, allowing you to proceed to the next level."

I recommend reviewing the topics’ videos before answering the questions. If your score falls below 80% (or any other target score), carefully review the topics you lost marks in. This will help you pinpoint your weaknesses and give you a sense of what to revise.