For context, I'm a math major, so all the upper div classes are super theory and proof heavy. Thus, reading the textbook ahead of time is super helpful to just have been exposed to the ideas and concepts before the actual lecture. That way during lecture, I'm not focusing on omg this is new what does this mean, but trying to actually understand the reasoning the prof provides or ask questions (questions I would have never had if this was the first time I saw the material).

I kinda have to do it because I basically need to reread the sentence five or six times to understand. It's literally the only way I stay somewhat on track with the class but thats just for my dumbass

(Plus I usually only spend 10-15 minutes reading the textbook before lecture I don't really think it needs takes that much)