i took LS 1: Halpin is a pretty good teacher for ls. The class isn't easy so you will have to work for your A. She bases her tests off her lecture notes so don't bother reading the textbook. The book has extra information that she won't even test you on. She goes through concepts rather quickly and will make you stay until the last second of class. Unfortunately I was cursed with a horrible TA who graded so much harder than the other TA's. Lab is about 20% of your grade. The good thing about the class is the clicker questions that are easy points to boost your grade. Her tests are hard and do not consist of very many questions. Each multiple choice is worth 5 points so your grade can easily drop. Her tests consists of short answer so you have to make sure you understand her slides and what she has gone over. [Side note: She's a bit awkward and says umm every 2 seconds haha]