Bridging Concept and Practice: Development Dilemmas and Breakthroughs in a Loose-Leaf Textbook for Mechanical Drawing

DOI: https://doi.org/10.62517/jhve.202616405

Author(s)

Wei Zheng, Yuan Xia*, Dan Liu

Affiliation(s)

School of Intelligent Manufacturing, Chongqing Industry and Trade Polytechnic, Chongqing, China *Corresponding Author

Abstract

Loose-leaf textbooks are widely promoted in China's vocational education reform, yet they often remain advanced in concept but stalled in practice. This paper reports our two-year effort to bridge that gap. We developed a loose-leaf textbook for Mechanical Drawing at Chongqing Industry and Trade Polytechnic, tracking its design, pilot testing, and revision over 18 months. Drawing on case-study data—including classroom observations, interviews, student feedback, and enterprise input—we propose a “four-dimensional” framework that anchors textbook development around purpose, content, mechanism, and value. Our implementation exposed three recurring problems: industry partners engaged only symbolically; dynamic updates became procedural rituals rather than quality-driven revisions; and student peer-assessments drifted toward subjective judgments. These dilemmas, we argue, stem from misaligned incentives, the absence of quality filters, and a premature transfer of evaluative authority to untrained students. To address them, we piloted three interventions: an interest–responsibility co-binding model for industry collaboration; a minimum viable review workflow to discipline content updates; and a rubric-based, anonymized peer-assessment system. Preliminary results show these strategies reduced content obsolescence from 8–10 months to 3–4 months and improved peer-evaluation consistency (standard deviation dropped from 0.51 to 0.28). Our experience suggests that loose-leaf textbook development, to be genuinely effective, requires not just a new binding format but a systemic rethinking of roles, processes, and evaluation practices.

Keywords

Mechanical Drawing; Loose-Leaf Teaching Materials; Integration of Industry and Education; Teaching Material Construction

References

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