Sample 3: Genuine marked & moderated IA
This is a genuine IA report comparing two different methods to find the amount of sodium hypochlorite in household bleach. It was written for the 2023 programme and submitted for examination in May 2025. A clean copy of the report is provided so you can assess it yourself. You can then compare the marks you gave with the marks and comments given by the school after internal moderation followed by the actual mark...