Sure, I can imagine the struggle your daughter is going through.
I took lots of notes, nearly verbatim from what was being said, simply because if I didn't keep on writing I would start daydreaming, then lose track of where the class was, which led to me losing interest in the discussion in general, and you can see where that would lead. I will say my 1st year grades were not particularly good as it took me awhile to realize what I needed to do to focus.
The problem though with the detailed notes I took was that it made for a lot of stuff to weed through when trying to study, which goes back to losing interest cause you look at this mountain of information and it's overwhelming as you know you don't have the attention to put into figuring out what is necessary. So I would set aside a 10 minute period to read through my notes and pick out what I felt were the main points and either highlight or list them separately.
I definitely had to set a time in advance cause otherwise I would become distracted, check email, start looking at my calendar and what plans I had, etc. But by knowing it was a small amount of time that I had to sit there, I was able to get through it and actually finish the task.
Paper writing, lab reports, etc., that always took me ages simply because I would lose focus and start on something else, then come back to it, then leave again, etc. To this day I don't have a huge tip in that area, and my solution of simply staying up till 4am to finish writing a paper that could have been done hours (well, really, days) earlier, is not something I would suggest. It 'worked' in that ultimately I would get my stuff done, but then I had no sleep, which made those lecture classes the next day even more challenging as I'd be fighting to stay awake, let alone take notes.
Another suggestion would be to find some friends in those lecture classes and make plans to study with them. I did this a lot, particularly in harder classes like chemistry. I wasn't so great at paying attention in lecture, but was able to understand and do the material once I did finally realize what we were supposed to be doing. Many of my friends were the opposite though, they paid copious attention in class but still didn't understand how to use the information. So we'd sort of swap. They'd kind of fill me in on what exactly the professor said, then I'd help them understand it. This worked well cause actually showing others how to do things is generally much easier for the ADD student than passively obtaining info. Plus it really helps to reinforce the material cause in order to teach others, you have to have a mastery of the topic yourself.
Christine, is your daughter in her 1st year? If so, that will likely be the hardest, not only because of the adjustment to the large lecture format from small high school classes, but also because of the sheer volume of large lecture classes at that intro level that 1st year students end up taking. For the spring, have her look into what options are available in smaller-sized classes, or things that are more interactive than just a professor droning on to 300 people. Once I got into the smaller, upper level classes things were a lot easier cause the format is so different.
Also, not that she should pick a major based on this, but I double majored in Spanish and psychology. The psych classes were large all 4 years. Yes, some were small groups, but even as a senior I had to take some classes that consisted of many kids in a lecture format. For the Spanish major, however, even my classes 1st year were small, and by the time I was a senior there were only a handful of people in them, so we had a lot of discussion, pretty much no time of just a professor dictating info. So if there are a few things your daughter is interested in, maybe she can try out the less common field and see how those classes work out for her.
One other thing I should add, I really never had great study habits overall. They never developed well in high school (like I said, taking ages to complete simple homework assignments, etc.) and therefore in college I was pretty lost. The above strategies helped a lot, but seriously, compared to my now husband (who was in many of my classes in college), I spent MUCH more time doing the same things as him and his grades were often better. Granted some of that was the subject matter, but still. For example, I was consistently better in history classes, but it took me hours and hours to write a paper that took him maybe 1 hour, and for the difference between his B+ and my A-, the time was not worth it. It's not like I took hours and hours to write cause I was actually writing all of that time, I was looking out of the window and thinking about my summer or whatever stupid thing entered my mind.
Oh yeah, 1 last thing, tell her to really try to take classes she is interested in. I know that goes without saying, but what I mean is that I had to take some science classes as requirements, but which ones didn't really matter. Well my friends were all in biochemistry so I signed up for that. I barely passed. Not so much cause the class was tough, though it was, but mostly cause I had little interest in the subject matter so my usual attention span was severely diminished. So a class that really needed a lot of effort on my part received little because it was so boring to me that I couldn't even get up to my usual focus level and the grade reflected that. If I had a valid interest in the class, however, then it was much easier to attempt to focus and I did much better.
I probably didn't help you at all, sorry, but I really hope things get a little easier for your daughter. One thing to consider, since you aren't totally sold on the ADD diagnosis, is to check into an auditory processing disorder. They aren't as commonly diagnosed as ADD, but a lot of the symptoms are similar. The key difference would be if it is much easier for your daughter to understand printed information than orally spoken info. I read what you said about reading the same paragraphs over and over, and I have always done that too (even now, which is incredibly annoying as I enjoy reading but books take me ages to complete), so that may not be an issue. But if she notices that it's the spoken info in lectures that is harder to grasp than the stuff she reads in textbooks, that could be part of the problem. If that is the case, I am guessing most professors could work with her on providing some sort of written copy of notes (I know a lot of ours used power point) and that might help out.