Line Breaks in Text Entry Boxes

I want to use a text entry box to capture learners' throughts about a topic at the beginning of a course, and then call their text back once the course is over to ask whether their impressions about the topic changed.

I'm anticipating that the users might enter a paragraph or two of text, but I'm running into two problems with the text entry box.

1) The text doesn't wrap to the next line when the user reaches the right margin of the text entry box. It just keeps running to the right into infinity.

2)  The user can't use the enter key to add a line break, because hitting the enter key automatically triggers the submit button attached to the text entry box.