Sound preparation is a desirable goal.
We question, however, whether attempting to teach students the same material in high school that they will encounter in the first year of college is an effective means of preparation. Their view of the college course is that it is redundant, even though by working at it they could greatly improve their understanding of the material. Second, solid students already understand the material from the high school course, and are thoroughly bored by the college rehash. The effect is to exacerbate the tendency of students to dislike and to avoid chemistry. Third, the college instructor fights a losing battle in trying to excite students about material that they have already seen.