Hey Antal,
Thanks for the question! Rather than limit you to a single channel, let me throw out something that I think might have more, or at least considerable, value: Dave is, to an almost preposterous degree, personally engaged with students, but he's also a really busy guy, so we cherish this Forum for its ability to connect students with...well, everyone, and at all times. Which is to say me, other instructors, other PowerScore students, and everyone in between. So what I propose, if you're willing, is that you send either me a personal message in hopes that I can help directly, or, and perhaps preferably, you post your query here for everyone to see and consider, so that you (and all of us) might benefit from the wealth of information and knowledge that this community has to impart.
Sometimes there's great advice to be found in the most unexpected (i.e. the most public) places
So let me know if we can help!
Jon
Jon Denning
PowerScore Test Preparation
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https://twitter.com/jonmdenning
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http://blog.powerscore.com/lsat/author/jon-denning