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 Course integrity tools don't have to be expensive for basic deterrence. Free options provide enough insight for spot-checks or student self-review. For my classes, I recommend a free ai checker that students can use voluntarily before submitting—it builds awareness and trust. I sample-check flagged ones manually. This encourages proper AI use as a helper, not a replacer. Enrollment feedback shows learners appreciate the transparency, and submission quality has noticeably improved without heavy policing.