Estonian teachers spot AI-written schoolwork but struggle to prove it

Estonian teachers are increasingly able to recognise when students have used artificial intelligence to complete their assignments, but proving it remains a serious challenge. The widespread use of AI tools has undermined teachers' ability to reliably assess the originality and creativity of student work. Mismatched vocabulary is cited as the most telling giveaway.

Estonian schools are grappling with a growing crisis of academic integrity as students turn to artificial intelligence tools to produce assignments, leaving teachers in an awkward position: they can often tell when a piece of work was not written by the student, but they cannot prove it.

The telltale signs

According to teachers across Estonia, the most common red flag is vocabulary that simply does not match the student's known level of ability. «Peamiselt reedab see, kui sõnavara ei ole õpilasele kohane,» — roughly, 'the main giveaway is when the vocabulary is not appropriate for the student' — is how educators describe the phenomenon. A student who has never used sophisticated academic language in class suddenly submitting a polished, nuanced essay raises immediate suspicions.

Other warning signs include an unusually consistent tone throughout the text, an absence of personal anecdotes or minor errors that characterise genuine student writing, and a general smoothness that is difficult to achieve without considerable practice or outside assistance.

Proof remains elusive

Despite these instincts, teachers admit that suspicion alone is not enough. Existing AI detection tools produce results that are unreliable and contested — some flag perfectly original student writing as AI-generated, while genuinely AI-produced texts can slip through undetected. Without conclusive evidence, teachers are reluctant to formally accuse students of dishonesty, fearing both unfairness and potential disputes with parents.

The situation reflects a broader tension playing out in schools across Europe and beyond. As AI writing tools become more capable and widely accessible, the line between legitimate assistance and outright academic dishonesty becomes increasingly blurred, and educational institutions have yet to develop universally accepted standards for where that line falls.

Schools searching for solutions

Estonian educators and school administrators are now debating how to adapt assessment practices to meet this challenge. Some favour oral examinations and in-class written tasks where AI assistance is impossible. Others argue that the focus should shift toward teaching students how to use AI responsibly rather than trying to ban it outright. The conversation is ongoing, and no clear consensus has emerged yet on how Estonian schools should respond to what is fast becoming a defining challenge for the future of education.