What work are you all planning to do in the holidays for eco? (How far into the course?)
My school was really slack and gave us no holiday homework (ikr) but I still did alright.
I don't think it's that important to learn ahead in the early stages. What I found was most of Unit 3 was a repeat of Units 1/2 and I was able to accelerate a bit relative to my class even without doing extra work. So if you did 1/2, you should learn most of unit 3 a lot quicker.
And as dantan suggested, knowing the content and mastering the content are two different beasts. To actually know everything inside out takes a huge amount of time, not just reading the textbook and doing a few questions/practice SACs.
The best thing you could do in the holidays is to read over half of Unit 3 which you should already be familiar with. This should freshen up the fundamental concepts and leave you in good stead for the rest of the year.
Regarding the earlier question about TSFX, I would heavily recommend against it. In my experience, Eco lectures are terrible and most of the work can be done at home by yourself.
If anyone has any eco-related questions, feel free to chuck me a PM
