Edited by: Douglas F. Kauffman, Consultant, Greater Boston, MA, United States
Reviewed by: Sara Cruz, Instituto Politécnico do Cávado e do Ave (IPCA), Portugal
Yousef Wardat, Yarmouk University, Jordan
†These authors have contributed equally to this work
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
Project-Based Learning (PBL) has been proposed as an alternative to traditional lecture-based instruction in university physics courses. This study examines the effects of PBL on undergraduates' conceptual understanding, problem-solving skills, practical competencies, engagement, and motivation.
A mixed-methods quasi-experimental design was employed with 150 physics majors from three universities in Harbin, China. Participants were stratified by key demographics and baseline physics knowledge, then randomly assigned to a PBL group (
The PBL group demonstrated significantly greater gains in conceptual understanding (Cohen's d = 1.85) and problem-solving ability than the control group (Cohen's d = 0.72). Observational and interview data revealed increased student engagement, collaboration, and real?world application of physics principles. Regression analysis indicated that initial academic performance and in-class engagement were significant predictors of post-test success (R2 = 0.65,
Findings suggest that PBL substantially enhances both cognitive and practical skills, fostering critical thinking and teamwork in university physics education. Practical implementation challenges—such as increased preparation time and the need for specialized facilitation—remain. Future research should explore the long-term impact of PBL in varied educational settings and its adaptability across disciplines.
Project-Based Learning (PBL) originated in the 1970s within Danish engineering education and has evolved into a widely adopted pedagogical model in higher education. PBL emphasizes a learner-centered approach in which students engage in collaborative projects to tackle complex, real-world problems, thereby fostering deep engagement, and critical thinking (
The “General University Physics Curriculum Standards” (2018) issued by the Ministry of Education of the People's Republic of China, emphasizes the cultivation of critical thinking, problem-solving abilities, and innovation (
Within the realm of physics education, PBL fosters active student participation by engaging learners in processes such as formulating questions, gathering and analyzing data, and collaborating with peers. In such environments, educators transition from traditional lecturers to facilitators, guiding students through exploratory learning to acquire both advanced knowledge and practical skills (
PBL is grounded in constructivist learning theory, which asserts that learners actively construct knowledge through engagement and social interaction (
Based on these theoretical underpinnings, we propose the following hypotheses:
A substantial body of research has demonstrated that PBL positively influences student motivation, engagement, and academic achievement in higher education (
This study adopted a robust mixed-methods approach to explore the impact of Project-Based Learning (PBL) on university students' comprehension of physics concepts, problem-solving abilities, practical skills, engagement, and motivation. The following sections detail the research design, participant selection and assignment, PBL implementation, data collection procedures, and data analysis techniques.
A quasi-experimental design was employed to collect both quantitative and qualitative data, offering a comprehensive view of PBL's effects. The quantitative component involved administering standardized pre- and post-tests to assess students' conceptual understanding and problem-solving proficiency. Simultaneously, qualitative data were obtained through structured classroom observations, semi-structured student interviews, and detailed analysis of project artifacts. These multiple data sources enabled a nuanced evaluation of student engagement, motivation, and practical skill development.
The study involved 150 undergraduate physics students enrolled in introductory courses during the 2023–2024 academic year at three universities in Harbin, China. To ensure comparability, participants were first matched on key demographic variables and prior academic performance—including baseline physics knowledge measured by pre-test scores. Subsequently, a stratified randomization process was used to assign participants evenly into an experimental group (
Within the PBL framework, students engaged in a series of well-structured, contextually relevant projects designed to foster deep understanding of core physics concepts and enhance practical problem-solving skills. Project design was aligned with specific learning objectives outlined in the physics curriculum. Instructors provided clear guidelines and detailed rubrics while granting students a degree of autonomy to select project topics and propose modifications based on their interests. This approach balanced structured learning with creative student input. Throughout the project cycle, instructors acted as facilitators, offering ongoing feedback, ensuring access to necessary resources, and controlling for potential confounding factors such as varying levels of prior physics knowledge.
Projects spanned several fundamental physics topics, including:
Students investigated wave interference using a laser and a double-slit apparatus. They formulated hypotheses, conducted experiments, recorded observations, and analyzed results to calculate the laser's wavelength.
In this project, students designed and constructed an electrical circuit to control lighting based on ambient light levels. They researched sensor types, created circuit schematics, built the circuit, and tested its functionality. The iterative process encouraged troubleshooting and refinement.
Students explored the energy efficiency of various insulation materials by designing experiments to measure heat transfer rates. Through data analysis, they determined the most effective insulation material and discussed its real-world applications, such as building design.
Student performance was evaluated using a combination of quantitative and qualitative measures:
Standardized pre- and post-tests assessed the grasp of core physics concepts.
The quality and accuracy of project outputs (e.g., laboratory reports, presentations, and prototype designs) were analyzed to determine the ability to apply theoretical knowledge to practical problems.
Classroom observations, combined with peer and instructor evaluations, provided insights into teamwork, communication, and overall engagement. Interaction frequencies and the quality of group discussions served as key indicators.
The depth of analytical reasoning and the ability to propose innovative solutions were systematically evaluated.
Instructors used detailed rubrics aligned with these criteria to ensure consistent and fair evaluation through both formative and summative assessment methods.
Quantitative data:
Standardized tests were administered in both the experimental and control groups before and after the intervention to measure students' conceptual understanding and problem-solving capabilities.
Structured observations were conducted in both PBL and traditional settings to document student interaction, participation levels, and teaching practices. An observation checklist was employed to ensure uniformity and reliability.
Students' project outputs, including reports, presentations, and other artifacts, were collected and evaluated to assess the application of physics concepts and practical skill development.
Semi-structured interviews were conducted with selected students from the experimental group to gain insights into their PBL experiences, particularly regarding engagement, motivation, and skill development. Interviews were audio-recorded, transcribed verbatim, and later analyzed.
The collected project artifacts underwent content analysis to evaluate creativity, understanding, and problem-solving strategies.
Means, standard deviations, and percentage scores were calculated for the pre- and post-tests to summarize performance trends.
Paired
To identify predictors of post-test scores, multiple regression analysis was performed. The model's R2 value (e.g., R2 = 0.65) was reported, and diagnostic tests for normality (e.g., Shapiro-Wilk test) and multicollinearity (e.g., Variance Inflation Factor, VIF <2 for all predictors) were conducted. Baseline physics knowledge was included as a control variable to account for its potential confounding effect.
Interview transcripts and observation notes underwent thematic analysis to uncover recurrent themes and patterns related to engagement, motivation, and skill development. Two independent researchers coded the data to ensure reliability.
The project artifacts were examined using content analysis, focusing on the demonstration of physics concept application, creativity, and problem-solving strategies.
The post-test results were analyzed to assess the effectiveness of PBL in enhancing students' conceptual understanding and problem-solving skills. As shown in
Descriptive and inferential statistics of the impact of PBL on students' conceptual understanding and problem-solving abilities.
| Experimental | 55.3 (10.4) | 75.2 (12.3) | 19.9 (9.2) | 12.35 | <0.001 | 1.85 |
| Control | 56.1 (9.8) | 62.7 (10.5) | 6.6 (8.3) | 4.56 | <0.001 | 0.72 |
Classroom observations revealed marked differences in student engagement between the two groups. In PBL classrooms, students were observed engaging in higher levels of interaction and collaboration—frequently posing questions, engaging in discussions, and actively participating in group projects. In contrast, students in traditional lecture-based settings were more passive, with significantly fewer interactive behaviors. On average, the experimental group recorded 15.8 interactions per 30-min session compared to 5.3 interactions in the control group, as detailed in
Classroom interaction frequency (interactions per 30-min session).
| Experimental | 15.8 (3.1) |
| Control | 5.3 (1.8) |
Thematic analysis of semi-structured interviews with students from the experimental group revealed several key themes:
Students reported feeling more motivated and actively involved in the learning process due to the hands-on, real-world problem-solving nature of PBL.
Many students noted that applying theoretical knowledge to practical tasks during projects significantly deepened their understanding of physics concepts.
Students emphasized that PBL fostered improved teamwork and communication skills, which they attributed to the collaborative project-based approach.
Inter-rater reliability for the coding process was high, with a Cohen's kappa of 0.82, ensuring the credibility of the thematic analysis.
Content analysis of students' project outputs provided further evidence of improved practical skills and conceptual application. The projects, which were evaluated using detailed rubrics, demonstrated not only creativity and innovative problem-solving strategies but also a strong integration of multiple physics concepts. The following case study highlights illustrate the outcomes:
Students explored wave interference using a laser and double-slit apparatus. They formulated hypotheses, conducted experiments, and calculated the laser wavelength based on their observations, demonstrating a solid understanding of wave phenomena.
In this project, students designed and constructed electrical circuits to control lighting. The iterative design process, which involved troubleshooting and refinement, enhanced their grasp of electrical concepts.
Students examined the energy efficiency of different insulation materials by designing experiments to measure heat transfer rates. Their analysis not only identified the most effective material but also provided insights into practical applications in building insulation.
Multiple regression analysis was conducted to examine the relationship between demographic factors and post-test scores while controlling for potential confounding variables such as baseline physics knowledge. The model yielded a statistically significant overall effect with an R2 value of 0.65, indicating that 65% of the variance in post-test scores could be explained by the predictors. Diagnostic tests confirmed that the assumptions of normality (via Shapiro-Wilk test) and multicollinearity (all predictors exhibited VIF <2) were met. The analysis indicated that both initial academic performance and student engagement significantly predicted post-test scores. Moreover, the PBL intervention itself was a significant predictor, suggesting that students with higher initial engagement levels benefited more from the intervention (
Results of multiple regression analysis.
| Initial academic performance | 0.35 | 0.08 | 4.38 | <0.001 | 0.42 |
| Student engagement | 0.29 | 0.07 | 3.98 | <0.001 | 0.38 |
| PBL intervention | 1.12 | 0.15 | 7.47 | <0.001 | 0.62 |
A MANOVA was conducted to assess the overall effect of PBL on multiple dependent variables, including conceptual understanding, problem-solving abilities, and practical skills. The results confirmed that PBL had a significant positive impact across these learning outcomes, with moderate effect sizes observed.
Multivariate analysis of variance (MANOVA) results.
| Conceptual understanding | 0.85 | 5.12 | <0.01 | 0.15 |
| Problem-solving abilities | 0.80 | 6.89 | <0.001 | 0.20 |
| Practical skills | 0.88 | 4.50 | <0.05 | 0.12 |
The findings from this study offer compelling evidence supporting the positive impact of Project-Based Learning (PBL) on university students' comprehension of physics concepts, problem-solving abilities, practical skills, engagement, and motivation. This section situates these results within the broader literature, discusses educational implications, and addresses the challenges and limitations associated with the implementation of PBL, while also offering concrete recommendations for future practice and research.
The significant improvement in post-test scores observed among students in the experimental group highlights PBL's effectiveness in promoting a deeper understanding of complex physics concepts and enhancing problem-solving skills. The large effect size (Cohen's d = 1.85) demonstrates that PBL had a much more substantial impact on learning outcomes compared to traditional lecture-based approaches (Cohen's d = 0.72). These findings align with previous studies that emphasize the role of PBL in promoting comprehensive learning outcomes through hands-on, real-world problem-solving tasks (
Quantitative and qualitative findings converge to demonstrate that PBL not only increases student engagement—as evidenced by the significantly higher interaction frequency in PBL classrooms—but also promotes practical skill development. Students in the PBL group were better able to apply physics concepts in meaningful, real-world contexts. Furthermore, qualitative interviews revealed that the collaborative and hands-on nature of PBL nurtured essential soft skills, including teamwork, communication, leadership, and adaptability (
One of the primary advantages of PBL is its capacity to cultivate students' collaborative and critical thinking skills. Participants reported improved abilities to work effectively in teams, share responsibilities, and jointly solve complex problems. Such skills are invaluable in scientific and interdisciplinary contexts, where teamwork and innovative problem-solving are paramount (
Despite its many benefits, implementing PBL presents several challenges (
Maximizing the effectiveness of PBL requires careful alignment with established curriculum standards and robust assessment frameworks. This study demonstrates that PBL projects designed with clear rubrics and well-defined learning objectives not only foster deep conceptual understanding and practical skill development but also ensure that students meet national educational standards (
While this study provides robust evidence for the immediate benefits of PBL, future research should investigate its long-term effects. Longitudinal studies could explore how PBL influences students' academic performance and career trajectories over time (
The successful implementation of PBL in university physics education depends on adhering to several key design principles:
PBL projects should be grounded in real-world contexts that enable students to connect theoretical knowledge to practical applications. In this study, projects related to wave interference and thermodynamics allowed students to explore physics phenomena with tangible real-world implications (
PBL activities must align with educational standards and clearly defined learning objectives to ensure that students acquire the necessary skills and knowledge (
Given time constraints, PBL activities should be manageable within class hours and available resources. Well-structured projects can maximize engagement while minimizing excessive out-of-class workload.
A supportive classroom environment is crucial. Educators should act as facilitators, providing ongoing guidance and feedback. In this study, instructors played a pivotal role in helping students navigate complex problems and effectively apply physics concepts (
By adhering to these design principles, educators can optimize the benefits of PBL, creating a more engaging, interactive learning environment that supports both academic achievement and the development of practical, transferable skills.
This study provides compelling evidence that Project-Based Learning (PBL) significantly enhances university students' conceptual understanding, problem-solving abilities, practical skills, engagement, and motivation in the context of physics education. The findings demonstrate that PBL not only deepens comprehension of complex physics concepts but also fosters essential soft skills, such as teamwork, communication, and leadership—skills that are crucial in both academic and professional settings. However, to fully realize its potential, challenges related to curriculum alignment and teacher support must be addressed. Structured PBL activities that conform to national educational standards and include comprehensive teacher training are key to maximizing its effectiveness. Future research should focus on the long-term impacts of PBL and explore its cross-disciplinary applications to further validate its efficacy as a powerful educational tool.
The datasets generated and analyzed during the current study are available from the corresponding author on reasonable request.
The requirement of ethical approval was waived by the Ethics Committee of Harbin University for the studies involving humans in accordance with the local legislation and institutional requirements. The ethics committee/institutional review board waived the requirement of written informed consent for participation from the participants or the participants' legal guardians/next of kin in accordance with the local legislation and institutional requirements.
CW: Methodology, Formal analysis, Data curation, Writing – review & editing, Supervision. LS: Conceptualization, Investigation, Writing – original draft. JJ: Project administration, Funding acquisition, Supervision, Writing – review & editing.
The author(s) declare that financial support was received for the research and/or publication of this article. Funding Project: 2022 General Project on Higher Education Teaching Reform: “Research on Pathways for Cultivating University Students' Innovative and Entrepreneurial Values in the New Era” (Project No. SJGY20220509), Heilongjiang Province Key Project on Higher Education Teaching Reform: “Exploration and Practice of ‘Industry-Education Integration + Multi-School Collaboration' in Teacher Education under the New Liberal Arts Context” (Project No. SJGZ20220132), Harbin College Counselor Special Project: “Research on Ideological and Political Education within University Students' Families in the New Era” (Project No. HSZ2022002), Heilongjiang Provincial Undergraduate “Outstanding Young Teacher Basic Research Support Program”: “Constructing a High-Quality Development System for Primary and Secondary Science Education” (Project No. YQJH2024106), and National Education Science Planning General Project: “Comparative Study of Modernization in Ethnic Education along the China-Russia Border under the Belt and Road Initiative” (Project No. BDA200078).
The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.