When constructing a quiz choosing "Open/free answer", is there a possibility/an option for the teacher to add key words somewhere so that the system can correct the student's answer?
It sounds like you're talking about fill-in-the-blank questions. With that question type, you can provide Canvas with the correct answer to automatically grade what students type. You'd also want to enter any acceptable variations. For example, if the correct answer is "apple," you may also want to provide Canvas with alternatives like "apples." Here's an article about creating fill in the blank questions with more info and screenshots: How do I create a Fill-in-the-Blank quiz question?
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