What are some core classes that are recommended to take if I'm interested in pursuing in forensic science
My forensic science degree required many courses in instrumental analysis (analytical chemistry) which involved the theory and function of such instruments as High performance liquid chromatography (HPLC), gas chromatograph (GC), IR and UV spectroscopy, mass spectrometry, and microscopy.
I would consider speaking to a advising counselor in the department in which a forensic science major might be in. If your school does not offer one, I would recommend Google a school in San Diego or in CA that does offer it and look at their course schedule. Typically those courses are required and mandatory to receive a degree in forensic science. You can then compare and contrast which courses that school offers that your school may also offer.
On a faster note, you may want to take introductory courses in biology, human anatomy, and I would definitely recommend getting some research experience by volunteering or taking a course for research credit in a lab that is chemistry or molecular biology. I currently have a student that is a laboratory science major which he can then use that degree to get a job in almost any field that may require laboratory experience.
Once you become an upperclassman (i.e. 3-4th year) you will be able to take more specific courses that would be geared towards what you want to do. Be a field agent or work the samples in a lab. You may also want to look into being a Pathologist.
Hope this information helps and good luck.