My professor gave me a module on history that contains several spelling and grammatical errors. Should I tell him about this or just ignore these mistakes?
For the textbook I've written, I appreciate any feedback, including typos, misformed sentences, vague formulations and of course errors. Some points to consider (partly contained in the other answers):
- Wait until you have a reasonable list or, e. g., until a chapter is over, the whole book, or the course.
- Check if there is some errata available somewhere. Some authors maintain an errata on their webpage, sometimes the publisher hosts this, for some lecture notes I have a blog post. Only send the points that are not already in the errata.
- There is no need to ask if such a list would be welcome. I guess it is safe to assume that this is the case (but others seem to disagree - see the comment below).
- For other feedback than errors and typos (e. g. feedback for formulations or the organization of the book) be prepared that your comments may not be taken into account for various reasons.
Oh, and for the lecture notes I reward bonus points for every mistake spotted and submitted by a student.
Many professors are interested in receiving feedback about possible errors in their lecture notes or, more generally, in their course material, albeit they might not be able to amend it immediately.
Since your professor might already know about those errors, ask them politely, e.g. (maybe it's not the best possible phrase, but it's just to get the idea):
Dear Prof. X,
Since I'm currently reading your history module, would it be useful for you if I compile a list of errata?
In this way you should not have any issue, even if they do not care.
Collect all the mistakes/comments you find throughout the semester. Wait until the semester ends, and your grade is assigned. Send email to the professor with all your comments. You can also mention that you enjoyed taking the class, if you did indeed. Professors usually enjoy feedback, when it is made on clear professional grounds.