Good morning Kimberly,
We already have a word counter on essay questions that, when defined in the question editor, is displayed to students and within the grade editor.
See this article for more information about the word counter.
We will take your plagiarism checker into consideration. Thank you so much for your feedback!
Yes a very simple student-facing plagiarism checker that showed them red/yellow/green alerts before submitting a written assignment would be incredible! It would be a useful learning tool for learners.