I'm a rookie and probably results oriented in my thinking. By the time he 3bets the turn it's a fold to me. The weak bet is a check-with-a-chip move or whatever it's called to give you a second chance to bluff at the pot. Or a suck bet if you will. I think it actually means strength quite often - his noobie brain might be thinking that he wants money in the pot, but if he bets big you might just fold and then he wins a small pot. It's not really a credible bluff, so he can't be expecting you to be considering a fold. Does he want you to call or raise?

I see it as a good spot for pot control. I'd call his weak bet, making a pot of $53 and on this river if I check I'd probably call a bet. If he pots it I'll have to weigh his range towards QJ or T9. I might fold to a bigger bet. Odd bits of aggression in the read really mandates that I call anything lower than $70 or so, due to the suggested bluff frequency - but I'd be happiest if his bet is below $40, and not too unhappy for it to go check/check. It's possible to lead $35 or something and then fold to a raise, but I tend to lean in favour of check/calling because it closes the action and I'm not at all sure what he's playing and I want to be able to close the action while the pot is small. I wouldn't feel too bad about winning a small pot here.