<p>I think that Midmo has covered the issues surrounding Physics, both Physics First and AP-Physics very well.<br>
S did find that learning physics first (though in his case it was AP-Physics) helped with Chemistry; chemistry in turn helped with biology. The connection between physics and biology, however, was more tenuous. As well, biology involved a great deal more memorization than either physics or chemistry (and to him, was therefore less attractive).</p>