Walsh is a decent professor. Her class isn't very hard at all. She gives out handouts in each lecture which provide a good summary of what you need to know for exams, but it's very helpful to go to lecture and listen anyway since she only lectures for about 20-30 minutes anyway. She also gives you practice exams before the two midterms (one during 5th week and one during 10th week). If you read the notes and do the practice tests you should do well on the tests. In addition to getting at least 50% on the tests, you have to turn in all the lab reports to get at least a C-. The lab reports consist of a pre-lab and post-lab due every week and are pretty easy (most post-labs are done with your lab partner). If you have questions, ask one of the T.A.'s because Walsh doesn't seem very approachable or helpful.