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This systematic literature review examines research trends in problem-based learning (PBL) within blended learning contexts by analyzing 64 peer-reviewed articles from Scopus database published between2020-2024. Using PRISMA methodology, this study identifies key patterns including the dominance of medical education contexts (71.9%), the significant impact of COVID-19 pandemic on pedagogical innovations, and the prevalence of experimental research designs (34.4%). Findings reveal that blended learning emerged as the most researched approach (61%), followed by online/distance learning (23%) and flipped classroom models (11%). The analysis indicates increasing publication trends in 2022 and 2024, with Education Sciences and BMC Medical Education as leading publication venues. This review highlights research gaps in engineering and technology education contexts, limited exploration of long-term learning outcomes, and insufficient mixed-methods studies. These findings provide valuable insights for educators, researchers, and policymakers in designing effective learning strategies that integrate problem-based and blended learning approaches in diverse educational settings.

This study aims to determine the effect of Problem Based Learning (PBL) and Inquiry learning models on students’critical thinking skills and cognitive learning outcomes on the topic of the human respiratory system. This research used a quasi-experimental design with a Non-Equivalent Pretest-Posttest Control Group Design. The research subjects were three eighth-grade classes at SMP Negeri 13 Lebong, consisting of two experimental classes taught using the PBL and Inquiry models and one control class using conventional methods. The research instruments included essay tests to measure critical thinking and multiple-choice tests to assess cognitive learning outcomes. Data were analyzed using ANOVA and LSD tests. The results showed significant differences among the three groups. The PBL model produced the highest improvement in both variables, followed by Inquiry, and lastly the control group. Therefore, PBL is proven to be the most Effective model inimproving students' critical thinking and cognitive learning outcomes in science education.

The development of digital media and innovative learning models in Junior High School Science education reflects a sustained commitment to meeting the demands of 21st-century skills and improving the quality of science instruction. A comprehensive literature review (2019–2024) reveals the dominance of the Research and Development (R&D) approach, which consistently yields highly valid, practical, and effective digital resources, such as Augmented Reality (AR), Android-based applications, and interactive educational games. These digital tools are synergistically integrated with modern instructional models, including Problem-Based Learning (PBL), Inquiry-Based Learning (IBL), and Predict-Observe-Explain (POE), which are proven effective in increasing student engagement, enhancing cognitive outcomes, and honing essential competencies such as Science Process Skills (SPS) and Higher-Order Thinking Skills (HOTS). Ultimately, this integration contributes significantly to overcoming learning difficulties in complex and abstract Science topics (e.g., the human digestive system) while also effectively addressing contemporary educational challenges, fostering meaningful learning experiences, and supporting long-term academic success for students.

Biology education in high school has an important role in shaping students' science literacy and critical thinking skills. However, ecological material, particularly the topic of Ecosystem Components and their Interactions, is often considered difficult because it is abstract and not easy to observe directly. This research aims to improve student learning outcomes through the application of the Problem Based Learning (PBL) model, which emphasizes real problem-solving, collaborative discussion, and active involvement in the learning process. The research uses the design of Classroom Action Research (PTK) which was carried out in two cycles in class X of St. Rosa de Lima Catholic High School Tondano involving 10 students in the odd semester of the 2025/2026 school year. Data was collected through observation of teacher and student activities, learning outcome tests in the form of pretests and posttests, and learning documentation. The analysis was carried out descriptively, qualitatively, and quantitatively by calculating the average score, percentage of completion, and student involvement. The results of the study showed a significant increase. The percentage of teacher activity increased from 58.3% in the first cycle to 87.5% in the second cycle, while student activity increased from 45.83% to 83.33%. The average score of students also increased from 70% in cycle I to 90% in cycle II, with classical completeness reaching 90%. These findings confirm the effectiveness of PBL as a contextual Biology learning strategy, able to bridge ecological concepts with real life, and increase students' curiosity, cooperation, and critical thinking skills.

Science education at the junior high school level demands learning strategies that encourage active student engagement as well as enhance conceptual understanding. The low learning outcomes of students in the science subject of ecosystem materials emphasizes the need for learning innovations that focus on student activities. This study aims to evaluate the effectiveness of the Problem Based Learning (PBL) learning model in improving the learning outcomes of grade VIII students of SMP Negeri 1 Tumpaan. The research was conducted in the form of Classroom Action Research with two cycles, each of which included the planning, implementation, observation, and reflection stages. The subjects of the study were 30 students of grade VIII. The research instrument is in the form of learning outcome tests given at the pre-cycle stage, post-test cycle I, and post-test cycle II. Data were analyzed using descriptive statistics and repeated measurement tests to ascertain the significance of improving learning outcomes. The results showed an increase in students' average scores from 58 in the pre-cycle to 75.33 in the first cycle, and 79.5 in the second cycle. The percentage of learning completeness also increased from 20% to 66.67% in the first cycle, and reached 80% in the second cycle. Repeated measurement analysis showed significant differences between stages with strong positive correlation values. These findings confirm that PBL is effective in improving science learning outcomes, encouraging active student involvement, and improving the equitable distribution of achievement in the classroom. This research has implications for the importance of implementing PBL as an innovative learning strategy in junior high schools to support the achievement of science literacy and 21st century skill development

This study aims to examine the application of the Project Based Learning (PjBL) model assisted by animated videos in improving problem-solving skills in Natural and Social Sciences (IPAS) subjects. The study used a quasi-experimental approach with a one-group pretest and posttest design. The subjects were 30 fifth-grade elementary school students selected as samples. The research instruments included a problem-solving ability test and an observation sheet for the implementation of learning. The results showed a significant increase in students' problem-solving skills after being treated through the PjBL model assisted by animated videos. The average posttest score was higher than the pretest, so it can be concluded that this learning strategy is effective in improving student learning outcomes. The use of animated videos helped students to visualize abstract concepts and engage more actively in the learning process. In addition, the results of observations of the implementation of learning showed that students became more active, enthusiastic, and able to work together in groups to complete the project. Student activity increased gradually, starting from the project planning stage, information collection, to the presentation of results. The teacher acted as a facilitator who provided direction and guidance, while students were directly involved in each process. This indicates that the integration of technology-based media supports collaborative and student-centered learning. Therefore, the implementation of the Project-Based Learning model with animated videos is not only effective in improving problem-solving skills but also fosters overall student engagement in science learning. Therefore, this learning model can be recommended as an innovative strategy to enhance problem-solving skills in primary education.

This study is motivated by the difficulty students face in understanding the concept of food chains, which is attributed to the conventional teaching methods still in use. Therefore, the researcher believes that the application of a new teaching model is expected to enhance student engagement in the teaching and learning process, ultimately improving learning outcomes. Natural Science is often considered difficult because of its many theories and the lack of variation in teaching methods, leading to poor student performance. Given these issues, an innovative teaching model is necessary. The aim of this study is to examine the impact of the Problem-Based Learning (PBL) model on students' knowledge in the Natural Science subject. The research method used is an experimental method with a quasi-experimental design. The study population consists of 50 fifth-grade students, with 25 students in the experimental group and 25 students in the control group. The hypothesis tested is that there is an effect of the Problem-Based Learning model on Natural Science learning outcomes. The results of the study show that the Problem-Based Learning model has a significant effect on students' knowledge. This is evidenced by the t-test results, which show a t-value of 12.400, greater than the t-table value of 2.01. Therefore, it can be concluded that the Problem-Based Learning model positively affects the understanding of food chain concepts in fifth-grade students. The findings of this study are expected to be beneficial for teachers in improving the quality of their teaching, for students to better understand the material through more engaging methods, and for the school environment in developing innovative and effective teaching practices.

This study aims to examine in depth the effectiveness of the application of the Children Learning in Science (CLIS) learning model in the Natural Science (Science) learning process. The background of this study stems from the problem of low active student participation in class, which is largely caused by difficulties in understanding abstract science concepts. The CLIS model offers a learning approach that emphasizes active student involvement through a series of systematic learning stages. The method used is a literature review with a qualitative descriptive approach. Analysis was conducted on 25 articles from national and international publications. Each article was reviewed based on relevance, research methods, main findings, and the suitability of CLIS application in various science learning contexts. The results of the study indicate that CLIS has proven effective in improving students' understanding of science concepts, developing science process skills such as observation, classification, measurement, and hypothesis testing, and encouraging active student participation during the learning process. In addition, this model is also able to improve critical thinking skills through exploration activities, experiments, group discussions, and reflection on learning outcomes. The CLIS stages, which include exploring students' prior knowledge, introducing new concepts through experiments, strengthening understanding through discussions, and strengthening concepts through reflection, enable students to construct knowledge independently and meaningfully. Based on these findings, CLIS is considered relevant and can be an effective alternative learning model to improve the quality of science learning at various levels of education.

This study aims to obtain the validity of E-LAPD using the Problem Based Learning (PBL) model that can be used to improve science literacy on chemical equilibrium material. The design used is a 4-D model designed to improve students' science literacy skills. The valid E-LAPD was evaluated through a validation sheet filled in by the validator using a Likert scale. Validity consists of construct validity which includes presentation components, graphic components, suitability of models and indicators to be improved and content validation which includes the suitability of learning objectives with learning outcomes and the suitability of problems or phenomena with the material being taught.  The validity of E-LAPD is declared valid if the score from the validator is at least 4 and does not have one score < 3 from the validator. The results showed that the E-LAPD developed had high validity indicating that the mode score of the validator ≥ 4. The developed E-LAPD was declared valid for use with a construct and content validation assessment which was described as valid with a score of 4, thus E-LAPD using the PBL model was declared valid for use to improve science literacy in chemical equilibrium material.

This study aims to assess how well the Problem-Based Learning learning model improves the learning outcomes of Science High School Negeri 1 Nanusa grade XI students studying the Structure and Function of Plant Tissues. Learning biology frequently calls both a thorough conceptual grasp as well as an instructional strategy that may best engage pupils. The Classroom Action Research methodology is used in this study in two cycles, each with two meetings. Pre-tests, post-tests, observation of teacher and student activities, and documentation of the learning process were used to gather data. The study's findings demonstrated that using the Problem-Based Learning paradigm improved student learning outcomes' average score from 70 in the first cycle to 82 in the second. Additionally, the percentage of classical completeness rose dramatically from 40% to 90%. Furthermore, the second cycle appeared to have better results regarding students' active participation in group discussions, comprehension of the subject matter, and capacity to communicate group work outcomes. These results suggest that biology instruction at the secondary school level benefits greatly from using problem-based learning. This methodology promotes students' active participation, conceptual comprehension, and improved academic performance.

This study aims to describe the improvement of student learning outcomes in science learning using the Problem Based Learning (PBL) Model in Class V of SDN 16 Pulau Karam, Pesisir Selatan Regency. This study is a classroom action research (PTK) with a qualitative and quantitative approach. Implemented in 2 cycles, cycle I consists of 2 meetings and cycle II consists of 1 meeting. The results of the study showed an increase in teaching modules in science learning using the Problem Based Learning (PBL) model, the implementation of science learning using the Problem Based Learning (PBL) model and student learning outcomes in science learning using the Problem Based Learning (PBL) model. This can be seen from the average observation results of the Teaching Module cycle I which was 87.4% (B) increasing in cycle II to 92.8% (SB). This is also seen in the average results of teacher activities in cycle I which were 85.9% (B) increasing in cycle II to 93.8% (SB). In student activities, the average cycle I was 84.3% (B) increasing in cycle II to 93.8%. In student learning outcomes, the average cycle 1 was 81% (B) and increased in cycle 2 to 91%. Based on these results, it can be concluded that using the Problem Based Learning (PBL) model can improve the results of learning science in class V SDN 16 Pulau Karam, Pesisir Selatan Regency.

Learning that is still dominated by teacher-centered approaches tends to result in passive student participation and low learning outcomes. This study aims to compare the effectiveness of the Socio-Scientific Problem-Based Learning (SSPBL) model and the Stimulus Environment Problem Solving (SEPS) model in improving student learning outcomes in the Ecology course. The research employed a quasi-experimental design involving two groups of fourth-semester Biology Education students at Universitas Muhammadiyah Surakarta in the even semester of the 2023/2024 academic year. Each group consisted of 20 students; one was taught using the SSPBL model, and the other using the SEPS model. Data were analyzed using the independent sample t-test and effect size analysis.The results showed that the SSPBL group achieved significantly higher cognitive learning outcomes than the SEPS group in both Cycle I (sig. = 0.041) and Cycle II (sig. = 0.049). The effect size results further confirmed the high effectiveness of the SSPBL model, with values of 2.846 (Cycle I) and 3.413 (Cycle II), categorized as "high." These findings indicate that the SSPBL model is more effective in improving learning outcomes, particularly in developing higher-order thinking skills through the integration of scientific concepts and socio-scientific issues. This study recommends the implementation of the SSPBL model in science education to foster deeper conceptual understanding and critical thinking among students.

This study aims to analyze the application of the Problem-Based Learning (PBL) learning model in improving students' cognitive learning outcomes in science learning, especially in the material on the structure and function of plant tissues. The research was conducted at SMP Negeri 4 Satap Wori, with the research subjects in the form of 21 grade VIII students who had heterogeneous learning abilities. This study uses a class action research (PTK) approach in two cycles. In the first cycle, student learning outcomes showed that only 38.1% of students had completed, while 61.9% had not reached the Minimum Completeness Criteria (KKM). Based on the reflection of the first cycle, improvements were made in the second cycle by increasing student involvement, providing more motivation, and forming heterogeneous learning groups. The results in the second cycle showed a significant increase, with 85.7% of students achieving learning completeness in accordance with the KKM. The increase in learning completeness from the first cycle to the second cycle was 47.6%. This study concludes that the PBL model effectively improves students' critical thinking skills, creativity, and motivation and can help students solve problems independently and in groups. Therefore, applying the PBL model is recommended to continue to be used in learning that involves real-world problem-solving.

This study aims to develop Nearpod learning media with a valid, practical, and effective Problem-Based Learning model for the subject of Science, especially on the material of changing the form of energy for fourth grade students of Elementary School. This research is motivated by problems found through initial observations and interviews. The method used is research and development (R&D) with the ADDIE model, which consists of five stages: analysis, design, development, implementation, and evaluation. The subjects of this study involved class teachers and fourth grade students of SDS Pelangi, while the object of the study focused on Nearpod learning media in Science learning on the material of changing the form of energy. Data collection techniques include interviews, tests, and questionnaires, with instruments in the form of teacher interview sheets, material validation questionnaires, media validation questionnaires, education practitioner questionnaires, and pretest and posttest questions. The results of the study showed that validation by material experts obtained an average percentage of 90% with the category "very feasible", while validation by media design experts obtained an average percentage of 97% with the category "very practical". Media effectiveness testing showed an increase in students' average scores from 54.73 ("quite practical" category) to 83.15 ("very practical" category) after using Nearpod media.