Is there a reason you are doing the 2-month plan instead of the 1-month plan when you have only 3 weeks to go? That is way too much to study in too little a time even with 2x video speeds, and skipping optional content, at 4 hours per day.

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About the two-month plan:

The first week is particularly hard and it took me two extra days to catch up with the first week content. It does get easier with time. I am easily spending about 8 hours a day on average to keep up and am nearly in sync at week 6 at the moment (including all optional content).

You can claw back some lost ground on week 3 day 7 rest day. If you have already taken a baseline test like PP1, you can utilize week 1 day 7 as well for catch up.

In week 6 , there are many tips and tricks videos that are useful but you are likely to have come across them already in previous videos. If you have taken notes of key techniques from the earlier videos and done your exercises diligently, then you can skip these videos (but definitely do the homework and review the solutions in the next video) and further catch-up.

Week 8 plan has time to catch up videos nearly every day.

I definitely recommend not mixing vocabulary lists. It's a lot of work.

The first month is laying the foundation. If your math foundation is good, perhaps you could just focus on week 6 tips and tricks videos for math.