Have I used good and well correctly?

In my opinion, your book is very good. The text is extremely well written. You did well explaining the rules of grammar. I am a good reader and this book was easy to follow and understand. I especially like the practices and exercises in the textbook. I find it beneficial to be able to see how well I understand the material. The exercises have proven to be good practice for me when I am having a difficult time writing sentences. When I am studying I glance over the chapter summaries to get a good idea of the chapter topics. I have found the side notes to be very helpful as well. Thanks to your textbook, I have become a good writer and I do well in my classes.

Good job!

Should I change this sentence?

When I am studying I glance over the chapter summaries to get a good idea of the chapter topics.

-the chapters' topics.

"the chapters' topics" is correct, yes.

And you need a comma after "studying."

Thank You both!

You're welcome!

Yes, you have used "good" and "well" correctly in your sentences. Here's an explanation of how they were used:

1. "In my opinion, your book is very good."

In this sentence, "good" is used as an adjective to describe the quality of the book. It is correctly used to express your positive opinion about the book.

2. "The text is extremely well written."

Here, "well" is used as an adverb to describe how the text is written. It is correctly used to indicate the high quality of the text's writing.

3. "You did well explaining the rules of grammar."

In this sentence, "well" is again used as an adverb to describe how you did in explaining the rules of grammar. It is correctly used to express that you performed the task in a skillful or satisfactory manner.

4. "I am a good reader and this book was easy to follow and understand."

Here, "good" is used as an adjective to describe your ability as a reader. It is correctly used to indicate that you have a skill or talent in reading.

5. "The exercises have proven to be good practice for me."

"Good" is used in this sentence as an adjective to describe the quality of the exercises. It is correctly used to express that the exercises are of high quality or beneficial for your learning.

To determine whether to use "good" or "well" in a sentence, consider whether you are describing a noun (use "good") or describing the action or verb (use "well").