NZQA Automated Text Scoring — AI Marking of New Zealand's National Writing Literacy Standard

New Zealand Qualifications Authority (NZQA) built an Automated Text Scoring tool, training a machine-learning model on thousands of previously human-marked scripts to grade the NCEA co-requisite Writing standard, a national literacy assessment that most secondary students must pass to gain NCEA qualifications.

Speed up and scale reliable grading of a high-stakes national writing assessment while retaining human review for borderline cases.

The AI does the primary marking; human markers check only the most borderline scripts, and wherever AI and human scores disagree, the human mark is used. A 2024 trial covered 36,000 writing samples before the tool was rolled out nationally for the May 2025 exam sat by more than 55,000 students; about 20,000 scripts (roughly 40%, concentrated near the pass/fail boundary) were still checked by a human marker.

NZQA reported an 80% agreement rate between the AI model and human markers in the 2024 trial, per chief executive Grant Klinkum. Following the 2025 national rollout, schools received results 3.5 weeks earlier than in the previous year.

The evidence base covers grading accuracy and turnaround time, not direct student learning outcomes. The 20% disagreement rate observed in the trial is non-trivial for a high-stakes qualification gate, which is why NZQA retained mandatory human review for borderline cases rather than fully automating the exam.