Where do I learn ESAT content?

I'm preparing for the ESAT in October, and I did the sample practice papers to see where I'm at in terms of base knowledge. I got 19/27, 10/27, 11/27 on Maths 1, 2 and Physics respectively.
However for Maths 2 and Physics I realised that I just don't know a lot of the content. For example in physics there's stuff about radioactivity, transformers, generators that I either haven't learned or have forgotten since GCSEs. Is there a place there are structured lessons, kind of like save my exams but for ESAT? I thought of exam ninja training temple but apparently it's a bit useless.
If anyone could share how they are learning the content, or if you've already done it it would be a great help