Every teacher has made these mistakes. You grade the first batch of essays and immediately realize you didn't have a system. You grade inconsistently. You second-guess your scores. By the time you've graded half the stack, you're frustrated and considering starting over. These mistakes are preventable. All it takes is knowing what to watch for.

The following seven mistakes show up repeatedly in September grading. If you can spot them and plan to avoid them, you'll save yourself hours of frustration.

Mistake One: Grading Without a Rubric

You think you know what good writing looks like, so you grade by feel. By essay 15, your standards have drifted. By essay 30, you're grading completely differently than you did on day one. Always have a rubric, even a simple one. It keeps you honest and consistent.

Mistake Two: Grading Too Many Essays at Once

You receive 90 essays and decide to grade all 90 in one marathon session. Fatigue sets in. Quality drops. You resent the work. Grade in smaller batches. Your grading quality and speed both improve when you're fresh.

Mistake Three: Writing Too Much Feedback

You write a paragraph of feedback on every essay. By essay 20, you're burned out and cutting corners. You can't sustain that pace. Write focused feedback. One to three points per essay. Make it clear and actionable. That's enough.

• Mistake Four: Grading the Whole Essay at Once – Grade by criterion across all essays instead. You'll maintain consistency better.
• Mistake Five: Letting Personal Bias Show – An essay from your star student gets gentler feedback than the same essay from a struggling student. Know this about yourself and fight it.
• Mistake Six: Not Setting a Return Date – Essays submitted September 15 should return by September 22. Without this commitment, grading stretches indefinitely.
• Mistake Seven: Trying to Give Every Grade a Perfect Justification – You can't. Some grades are judgment calls. Move on. Trust your rubric.

Learning From Mistakes in Real Time

If you recognize you've made a mistake halfway through your grading stack, stop. Adjust your approach. Re-grade a few essays if needed. You have time in September to course-correct. Use it. The habit you establish now will carry through the year.