Start with the highest-mark topics
Build a weekly plan around the topics that appear often and connect to many question types: stoichiometry, bonding, energetics, kinetics, equilibrium, acids and bases, redox, organic chemistry, and measurement/data processing.
For each topic, keep a short error log. Track the question type, the reason marks were lost, and the fix. This turns revision into targeted repair instead of repeated rereading.
Treat the IA as a scoring project
A strong Chemistry IA needs a focused research question, controlled method, clear processing, and honest evaluation. Choose a question that produces reliable data and gives you enough room for chemical reasoning.
Do not leave evaluation until the end. Document limitations and improvements while collecting data so the final write-up is specific and credible.
Train exam precision
Top Chemistry students do not only know content. They recognise command terms, show working clearly, and include the correct units, significant figures, and chemical terminology under time pressure.