I keep getting 40% on every test I take

  1. Go to your counseling center. Like @suzy100 says, maybe you have depression or something. Get that screened for and addressed first.
  2. Read this:http://talk.collegeconfidential.com/college-life/1920853-college-is-a-step-up-from-hs-16-tips-on-doing-well-in-college.html