Preparing students for the real challenges in life is one of the most important goals in education. Constructivism is an approach that uses real-life experiences to construct knowledge. Problem-Based Learning (PBL), for almost five decades now, has been the most innovative constructivist pedagogy used worldwide. However, with the rising popularity, there is a need to revisit empirical studies regarding PBL to serve as a guide and basis for designing new studies, making institutional policies, and evaluating educational curricula. This need has led the researchers to do a meta-analysis to analyse the effectiveness of PBL on secondary students' achievement in different scientific disciplines. Following the set of inclusion and exclusion criteria, 11 studies in Eurasia, Africa, and America conducted from 2016 to 2020 have qualified for this study. Six of which focused on JHS (n = 1047) and five on SHS (n = 375). Studies were obtained from various meta-search engines including Google, ERIC, and JSTOR. Further, the researchers used Harzing's Publish and Perish software to exhaust the search process. Sample size, mean, and standard deviation were analysed using the Comprehensive Meta-Analysis version 3 to determine the effect sizes (Hedge's g) and the results of moderator analysis, forest plot, funnel plot, and Begg-Mazumdar test. Findings have shown that PBL, as an approach to teaching science, had a large and positive effect (ES = .871) on the achievement of secondary students. However, grade levels and various scientific disciplines did not influence students' learning achievement. The conduct of more studies on the different factors affecting PBL implementation and specific effects of PBL on various student domains is recommended to facilitate comparative educational research in the future.

Gamification in education offers an innovative way of learning. However, some studies claim that, while it helps raise students' motivation, the kind of motivation is extrinsic and, so, intrinsic motivation declines with time. The researchers used the descriptive research design to describe the STEM students’ intrinsic motivation along with the utilization of game elements in teaching genetics through a learning management system. The researchers collected quantitative data using the Intrinsic Motivation Inventory, which were analyzed through descriptive statistics and complemented with qualitative data from the students' journals and interviews. Overall, the students agreed (M = 5.38, SD = 1.20) that gamification, despite being characterized as extrinsically motivating, had intrinsically motivated them. Its proper implementation helps students adapt to and overcome unfavorable behaviors towards competitiveness and emphasizes the role of teachers in facilitating learning. Time constraints, peer pressure, and distractions were noted; hence, more research is needed to address these challenges and determine the long-term effects of gamification.

Modes of teaching and learning have had to rapidly shift amid the COVID-19 pandemic. As an emergency response, students from Philippine public schools were provided learning modules based on a minimized list of essential learning competencies in Biology. Using a cross-sectional survey method, we investigated students’ perceptions of the Biology self-learning modules (BSLM) that were designed in print and digitized formats according to a constructivist learning approach. Senior high school STEM students from grades 11 (n = 117) and 12 (n = 104) participated in a survey using a 3-point Likert-scale questionnaire uploaded online through Google Forms. The survey results indicate that majority of the students perceived the modules positively, suggesting that aspects of the modules that were salient to students corresponded to essential elements of constructivist pedagogies. However, during interviews, students reported several difficulties in learning with BSLM as it was constrained by, to name a few, the use of unfamiliar words, lack of access to supporting resources, slow internet connection, and time constraints. To address these problems, teachers reported that they gave deadline extensions, complemented modules with other channels of support, and used online and offline platforms for reaching out to students to answer their queries and plan out their schedule for the week. The findings across the data sources point to the complex demands of emergency distance education that teachers, as curriculum designers and enactors, need to bear in mind in order to craft productive pedagogies, constructivist or otherwise, during this unprecedented time.

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The urgent call by UNESCO to scale up interventions for the achievement of sustainable development goals motivated this study to assess the level and association of teachers' (n =107) and students' (n = 342) knowledge, attitudes, and behaviors (KAB) regarding education for sustainable development, focusing on Pili (Canarium ovatum). This is a subset of a larger project that involves Pili to contextualize learning and instructional materials. The researchers used a descriptive cross-sectional survey approach and distributed a questionnaire through Google Forms. KAB levels were categorized into poor, moderate, and high using descriptive data analysis and determined their association with one another using Pearson's Chi-square. The findings indicate that, although the associations among the KAB of teachers are distinct from those of the students, they both perceived that possessing favorable knowledge and attitudes are insufficient to generate positive behaviors. Thus, efforts to increase teachers' and students' motivation and involvement and to help them carry out favorable behaviors toward sustainable development are imperative. Given this, identifying the barriers to converting knowledge and attitudes into behaviors and considering the factors that involve the association of KAB in promoting sustainable development, particularly in education, are recommended.