<p>Would it be unusual for me to attend lectures other than the one I signed up for just for the sake of listening to the lecture again to perhaps get a better understanding of the material?</p>
<p>no people do it all he time its called auditing a class and it costs just as much as taking the class but you get no credit although some professors will let you sit in on their lectures without having to pay for the auditing if you ask them.</p>
<p>Just know that sometimes lectures are at capacity and those who are sitting in might be unable to sit in because of safety concerns. And ALWAYS if the seats are full you must give your seat to who is actually registered in class. </p>
<p>Other than the above, you’re free to sit in!</p>