Xinjin Li@XinjinLi

We have designed a machine for correcting paper homework with traceable marks. Based on new large model technology and product forms, it enables one-click scanning, traceable correction, and data analysis of paper homework. It can correct more than 60 sheets of homework per minute, with a cost of about 5 cents per sheet and a correction accuracy rate of over 97%. Currently, it has been deployed at Benyuan Primary School in Shenzhen and Wen San Road Primary School in Hangzhou, having corrected over 10,000 sheets of homework and more than 200,000 questions. Additionally, the system aims to provide teachers with long-term tracking of student progress through data analysis, further enhancing teaching quality and student learning outcomes. Compared to existing photo-based homework correction software, our correction machine achieves one-click batch traceable correction, significantly reducing the workload of teachers in correcting homework. The video has been viewed over 50,000 times on platforms such as Bilibili and Xiaohongshu, with hundreds of teachers actively applying for trials. We developed a comprehensive AI grading system for school tests, incorporating automated exam paper scanning and question recognition with OCR enhanced and refined by LLM, and AI-generated grading results using Java (backend), Vue.js/JavaScript (frontend), and Junit and Jest(test).