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Feedback on Resources: Exercise Solutions -- why we only share these with teachers
We've had some recent requests for access to the exercise solutions manual from students (e.g. to check work or lead study groups) as well as parents looking to help their kids. I understand our policy of not providing solutions to students and parents is unpopular, so I wanted to explain why it's a policy we can't reasonably change.

First, some things to be aware of:

1) In many classes, homework contributes to the grade.
2) Homework is frequently chosen from questions in the course textbook.
3) If solutions are shared with a handful students, the solutions will likely show up online or shared privately among students.
4) If one student gets access to solutions, we need to give access to all students. (We must treat all students equally and avoid even any perception of favoritism to some students over others.)

Now with those considerations in mind...

5) Because of #1 and #2, many teachers will become frustrated with our books if they cannot use some of the exercises for graded homework. This will lead some of those teachers to adopt another book (understandably!), likely at a cost to each student of around $100 to$200. This is the primary reason we do not release solutions: it undermines the utility of our books.

6) If solutions are readily available, the usefulness of student collaborations and study groups diminishes, possibly leading more students to "go it alone". However, these collaborations are important since they help students further their understanding by working out problems together.

7) If a student can rely on a solution manual, the student may always get the correct answer on homework by following the provided answer while sometimes not understanding the solution. This can lead to a false sense of confidence.

8) We cannot reasonably bend our rule for parents. Some students will pretend to be a parent, and we cannot reasonably distinguish between students and parents online.

I hope this clarifies why we don't share the solutions manual with students or teachers. In the end, if it wasn't in place, it would lead to many teachers choosing a different, more expensive textbook, and that would be much worse for students and parents.

Best,
David