I am in a small school in North Dakota and will have four students in the class next year. I have been here two years after retiring from another state. Two years ago they took an online physical science class and from what I can figure out they learned very little to use for background. They will have had a bit of trigonometry. So I am looking for an easier physics book that can introduce them to physics and somewhat bring them up to speed. Any suggestions for a book or program that would be most helpful to them? Thanks in advance!