Tests are terrible! She asks irrelevant questions on them. You could literally study the important information, but she'll ask questions about random specific percentages. She doesn't really even teach the class. She has the students take turns teaching a chapter of the book, and she sits there and does nothing. So you don't even know what she wants you to learn cause she doesn't teach!

She's a nice person, but not the best teacher . Maybe going to office hours might help.