the overall lack of critical thinking skills
a lot of the education in the US that I took part in was simply regurgitating facts and information
an interaction with those facts and demonstrate that you understood it and could apply it to come to your own conclusions or support an argument
Boom, boom, BOOM!Canuckster absolutely nailed it!
HUGE pet peeve of mine is that our U.S. schools so often are trying to justify their keep by seeing who is best at memorization of often completely irrelevant "facts" of names, dates and places. I don't care what what date some general won a war, I want to know, what led up to the war, WHY IT MATTERED who won, and what the subsequent repercussions were, what's the lasting impact or influence. High School and even a ton of university curriculums are filled with irrelevant equivalents of "Trivial Pursuit," and in which the answers are all neatly packaged in multiple choice tests. Why, because they are much faster and easier for some grad student to grade (don't even think a
professor actually teaches most first and second year classes). Test over, grades in, three weeks later, most of those that aced the test couldn't still tell you most of the answers. Why? Because short-term memorization doesn't last. And the tests are interspersed with by tons of "busy work" that is the equivalent of a pointless "jumping through hoops."
And because kids so often aren't expected to produce the facts and then build a conclusion from them, they don't know how to. I see kids online, all the time, arguing to connect A to Z, yet without any connective, factual evidences in between. They just think they can connect A to Z without any supportive facts or traceable connectivity. And they typically don't understand the differences between facts and pseudo evidences. Often emotion and feelings are given far more weight than any untidy facts. When I was a kid, I used to think that very basic logic was mostly common sense. If so, it's far from common nowadays. How many times do people make comments which include, "I feel that ..."; "I've heard ..."; "That seems ..."; "Well, I believe ..."; "People say ..."? They think emotional thinking is as valid as stating facts. Scary!
Fortunately, I had very tough classes in earning my journalism degree. Lots of logic. I even had to take algebra, supposedly because it encourages the logical processing of information (or

the tossing of the course book, multiple times, across the room, with more than a few, choice, R-rated words).