A familiar experience: you grade the first five essays carefully, applying your rubric rigorously. By essay 20, you're faster and more lenient. By essay 40, you've mentally adjusted your expectations downward. This drift is natural—fatigue changes how we judge—but it's unfair to students whose essays fall later in the grading pile.

Sources of Grading Inconsistency

• Fatigue Drift: Your standards slip as mental energy declines. Excellent becomes good enough; good becomes acceptable.
• Anchoring: The quality of earlier essays shapes expectations for later ones. If you grade five weak essays first, stronger ones seem excellent by comparison.
• Rubric Interpretation Drift: Your mental definition of 'sophisticated sourcing' shifts slightly with each essay as you see new examples.
• Speed Pressure: When you rush, you're more likely to apply standards loosely and inconsistently.

Calibration Strategies That Work

Set anchor papers before you grade. Identify essays at each score level—excellent, proficient, approaching, beginning—and use them as your reference point throughout grading. When you're unsure about an essay, compare it to your anchor, not to the essay you just finished.

Re-calibrate partway through. After grading 20-30 essays, stop and re-grade your anchors. Have your standards drifted? If so, acknowledge that and apply the corrected understanding going forward. Some teachers re-grade their first few essays at the end to ensure consistency.

Use AI grading to maintain mechanical consistency while you handle nuance. The AI applies your rubric with perfect consistency; you focus on adjustment and personalization where human judgment adds value. This hybrid approach eliminates the most egregious sources of drift.

Tracking Consistency Across Your Grading

After you finish grading, look at your grade distribution. Are earlier essays graded differently than later ones? Do scores shift noticeably partway through? That data reveals where drift occurred. Use it to understand your grading patterns and adjust next time.

Consistency is a skill teachers develop. Each grading cycle teaches you something about where you drift and how to prevent it. Over time, sustained attention to calibration produces reliable, fair assessment.