The websites don't matter that much (understanding should be your main priority) but freesciencelessons is useful for recapping science (AQA). Physics and Maths tutor is also useful to check out for topic questions and notes (specifically english, although litcharts and genius are arguably better).
Focus on improving exam technique and ensuring you have no gaps in your knowledge (use the specification) when you get closer to GCSE season.
Also, Anki is overrated.