Test: Using AI to Help K–12 Teachers Grade Papers — Gemini vs ChatGPT, Automated Grading with n8n

In this video I test AI grading on elementary school exam papers. I found Gemini’s handwriting recognition to be superior to GPT-5, and I use n8n to build an automated grading workflow.

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00:00 Video intro and overview of AI grading
00:41 AI model accuracy test: math questions (Gemini AI vs ChatGPT)
02:51 Gemini AI test results and advantages (including coordinate output)
03:59 ChatGPT test results and challenges
05:49 Automated grading workflow explained (n8n Workflow)
06:06 PDF.co API intro and how it’s used in grading
07:44 Gemini AI prompt design and grading format (Correct/Wrong, color coding)
08:42 Workflow demo and optimization suggestions (graded PDF shown)
09:27 Upcoming events and course information

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Notes and tools mentioned:
• This video’s AI-generated subtitles use formal written language. YouTuber AI tool: https://youtuber.ai/
• Receipt OCR and automated bookkeeping tool: https://bookkeep4u.com/
• Cantonese AI voice tool: https://audiodub.ai/

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