Innovative Practice of Junior High School Physics Teaching Driven by Situations — An Action Research by Frontline Teachers in Singapore

Zheng Lina 【Singapore】

Abstract:

Under Singapore’s student-centered educational philosophy, junior high school physics teaching faces challenges such as abstract concepts and divergent student interest. Based on frontline teaching practice, this paper proposes three innovative strategies: constructing a “life–phenomenon–model” situation chain, driving in-depth inquiry with cognitive conflicts, and expanding practical fields by building a “life laboratory”. Through real cases (e.g., exploring buoyancy with milk tea cups, analyzing mechanical laws with subway acceleration), this paper demonstrates the effectiveness of innovative design in activating thinking, deepening understanding, and cultivating scientific literacy. Teaching feedback shows that 90% of students believe physics learning is more closely connected to reality, and 85% report a significant improvement in understanding abstract concepts. This paper emphasizes that teachers should tap teaching resources from daily phenomena, reconstruct classrooms with design thinking, and realize the seamless integration of “knowledge” and “application”.

Keywords: teaching design innovation; situation chain; cognitive conflict; life laboratory; junior high school physics; Singapore education

Introduction

Singapore’s junior high school physics education focuses on cultivating scientific thinking and innovative abilities, yet traditional teaching still suffers from problems such as over-abstract concepts and stylized experiments. As frontline teachers, we urgently need to break through textbook limitations and deeply integrate physics knowledge with students’ life experience and local Singaporean contexts. Abandoning the conventional path of relying on high-tech equipment, this paper focuses on the creative transformation of teaching design itself and explores how to use low-cost, highly interactive strategies to achieve deep learning in regular classrooms. The following innovative practices have been verified through two years and three rounds of teaching iterations, with both theoretical depth and practical value.

I. Innovation Basis: Paradigm Shift from “Knowledge Transmission” to “Thinking Activation”

Traditional physics classrooms often fall into the cycle of “formula memorization – example practice”, leading students to mistakenly believe that “physics equals problem-solving”. The core of innovative teaching lies in reconstructing the learning logic:

Taking phenomena as anchors: Starting with familiar Southeast Asian life scenes (e.g., heat conduction in nasi lemak – how heat transfers from fire to food through cookware during steaming, and the principles of specific heat capacity and thermal conductivity behind different cooking speeds; optical principles of the Marina Bay Light Show – how dispersion and superposition of LED light sources, reflection and refraction of light create dynamic light and shadow effects), abstract concepts are transformed into perceptible phenomena. Studies show that teaching based on real-life situations significantly improves students’ depth of understanding of physics concepts. Singapore’s Ministry of Education (2022) White Paper on Science Education notes that situational teaching increases students’ long-term retention of core concepts by 40%.

Taking problems as engines: By designing a stepped question chain (e.g., “Why do handrails tilt when the Singapore MRT turns?” – guiding students to first observe the phenomenon, then think “What force is needed for an object to move in a circular motion?” “What provides centripetal force?” “How is the tilt angle of handrails related to speed and radius?”), students are guided from observation to principle derivation. This problem-driven model aligns with constructivist learning theory. A 2021 study by the U.S. National Science Foundation (NSF) shows that students taught with question chains have 35% higher logical reasoning ability in solving complex physics problems than those in traditional teaching groups. To the possible concern that “problem design is too complex”, the response is: the stepped question chain guides step-by-step through“known –unknown–connection”, transitioning from “uniform linear motion” to“curvilinear motion”before introducing“centripetal force”, ensuring students complete the thinking leap within their cognitive load.

Taking modeling as a bridge: Encouraging students to build physical models with simple materials (e.g., making a force analyzer with rubber bands and cardboard – simulating deformation and equilibrium under different tensions to explore Hooke’s Law; building a fluid resistance device with transparent tanks, liquids of different densities, and small balls) to realize the thinking leap from concrete to abstract. The International Organization for Physics Education (IOP) 2023 case bank shows that hands-on modeling improves students’ accuracy in understanding abstract physical quantities (e.g., force, energy, field) by 58%. To the concern that “modeling takes too much time and affects progress”, time allocation can be optimized through group collaboration and modular task design (e.g., preset basic model frameworks for students to fill in variables and data), ensuring efficient integration of modeling with knowledge objectives.

Case Demonstration

In teaching Buoyancy, instead of directly explaining Archimedes’ principle, a situation chain is designed:

Phenomenon observation: Show the floating and sinking of three milk tea cups (full sugar, half sugar, sugar-free) in clean water.

Cognitive conflict: Guide students to question “Do heavy objects necessarily sink?” (the full-sugar cup floats instead).

Modeling inquiry: Measure the weight of displaced water with an electronic scale and discover the relationship between buoyancy and displacement.

Principle sublimation: Understand the application of buoyancy by analogy with the displacement registration system of cargo ships.

II. Innovation Strategy 1: In-Depth Inquiry Design Driven by Cognitive Conflict

Using contradictions between students’ preconceptions and scientific laws to create thinking tension and stimulate active construction:

(1) Preconception Demolition Method

Typical Conflict Design

(2) Counterintuitive Experiment Matrix

A [Life Phenomenon] → B {Student Prediction} → C [Experiment Verification] → D {Result as expected?}→ D (Yes) → F [Deepen Conceptual Understanding]→ D (No) → E [Trigger Cognitive Conflict] → G [Group Reconstruct Theory] → C

Localized Practice for Heat Transfer Unit

Conflict creation: Let students touch metal railings and wooden chairs (predict metal is colder → measure the same temperature). Through touch, students often predict metal feels colder, but thermometer readings show equal surface temperatures. This cognitive conflict effectively stimulates inquiry and guides thinking about the difference between “thermal perception” and “actual temperature”. In Singapore’s tropical climate, metal and wood both warm in sunlight, but metal conducts heat faster, drawing heat quickly from hands and creating a “colder” illusion, while wood conducts heat slowly. This activity uses common school playground facilities to enhance immersion.

In-depth inquiry: Compare surface temperature distribution with an infrared thermal imager (reveal the essence of thermal conductivity differences). The imager visually shows that metal has faster temperature gradients and more uneven distribution, while wood is uniform. This reveals that metal is a good thermal conductor and wood is a poor conductor. Specific data: thermal conductivity of copper ≈ 401 W/(m·K), wood ≈ 0.1–0.4 W/(m·K), strengthening understanding from physical parameters. This inquiry meets Singapore Ministry of Education science curriculum standards of “obtaining evidence through observation and experiment”.

Real-life connection: Analyze the principle of insulation material selection for HDB exterior walls (linked to Singapore’s energy-saving policies). As a high-density country, building energy conservation is key to “City in a Garden”. Students analyze local insulation materials (e.g., polystyrene foam, glass wool) to understand how low thermal conductivity reduces heat gain/loss and air-conditioning use. Singapore Housing & Development Board (HDB) energy-saving standards require new HDBs to meet insulation targets, directly related to household energy bills and national carbon emissions. Case data show new insulation reduces air-conditioning use by 15%–20%, helping students recognize the practical value of heat transfer knowledge in solving local energy issues.

III. Innovation Strategy 2: “Life Laboratory” Resource Development Paradigm

Extending teaching space to the community and building strong links between physics knowledge and local scenes:

(1) Singapore Scene Teaching Resource Bank

(2) Low-Cost Experiment Development Principles

Localized materials: Use curry leaf extract as a natural color indicator instead of chemical reagents (for specific heat capacity experiments). Traditional expensive and toxic reagents (e.g., copper sulfate) are replaced by curry leaf extract, which changes color at matching temperatures. This reduces experiment cost by about 60%, cuts chemical waste, and is safe and environmentally friendly, with clear phenomena comparable to traditional methods.

Simplified tools: Use smartphone sensors instead of professional equipment (measure elevator acceleration with Phyphox). Traditional acceleration sensors are costly and complex; Phyphox uses built-in triaxial accelerometers with sampling frequency over 100 Hz, error < 5% vs. professional laser rangefinders. Cost is reduced to below 1/20, supporting daily inquiry.

Practical outcomes: Design HDB water-saving devices (application of fluid mechanics). Based on Bernoulli’s equation and Venturi effect, a faucet restrictor 3D-printed for ~SGD1 cuts water use by over 30%. Pilot use in Malaysian HDBs reduced monthly water use by 22%, verifying fluid mechanics and addressing global water scarcity.

Interdisciplinary Project Case

Singapore Rainfall and Drainage System Optimization (integrating physics/geography/engineering)

Measure water permeability of different surfaces (grass, asphalt, permeable bricks).

Build ramp models to simulate rainwater flow speed (study slope and drainage efficiency).

Analyze local ditch design (apply continuity equation of fluid).

Propose campus drainage improvement plans.

IV. Innovation Strategy 3: Concept Visualization Tool Development

Developing visualization tools to reduce cognitive load for abstract physical quantities:

(1) Dynamic Concept Mapping

Take Energy Conversion as an example:A [Solar Energy] → (Solar Panel) → B [Electrical Energy] → (Motor) → C [Kinetic Energy] → (Friction) → D [Thermal Energy] → (Thermal Radiation) → E [Atmospheric Energy]

Teaching aid: Simulate energy transfer paths with flowing colored balls.

Situation correspondence: Mark solar panel locations in Singapore (e.g., HDB rooftops).

(2) Physical Quantity Entity Models

Electric field intensity: Show magnetic field lines between electromagnet poles with magnetic powder.

Sound frequency: Use Arduino to control LED strobe matching pitch.

Atomic structure: Build adjustable electron orbital models with magnetic sheets.

V. Innovation Effectiveness and Reflection

Through two academic years of controlled teaching evaluation (sample size N=240), innovative strategies significantly improved learning efficiency:

Practical Reflection

Resource development bottleneck: Teachers need to build interdisciplinary collaboration networks (e.g., joint weather station with geography department). Single-subject development lacks real context; interdisciplinary integration improves understanding of “atmospheric pressure” and “thermal expansion” by 40% and participation by 65%. Projects with biology (mechanical balance in plant phototropism) and chemistry (interdisciplinary verification of combustion conditions) break resource limitations.

Evaluation system adaptation: Increase weight of open tasks (e.g., “Design typhoon-resistant window structures”). Traditional evaluation overemphasizes memorization; open tasks integrate mechanics, materials, and engineering, improving problem-solving scores by 28%, with 85% of students more willing to explore physics applications. This aligns with core competency requirements and avoids exam-oriented tendencies.

Localization deepening: Develop cultural physics courses (e.g., thermal principles in Nyonya kitchenware). Analyzing heat conduction/radiation in traditional clay pots, boiling point in coconut milk stews, and thermal convection in Nyonya pastry baking increased mastery of “heat transfer methods” from 62% to 89%, with 92% of students valuing culture–physics integration, achieving knowledge and cultural inheritance.

Conclusion

Teaching design innovation does not depend on technical spectacle but on reconstructing the logic of knowledge presentation. By transforming Singaporean elements such as HDB elevators, hawker center food, and tropical climate into physics situations, we make Newton’s laws visible in Marina Bay waves and Ohm’s law shine in MRT lines. The creativity of frontline teachers lies in opening windows for students to understand the world’s essence from the floating of a milk tea cup and the roar of a thunderstorm. Only when physics returns to life can scientific spirit truly take root in the heart.

References

[1] Ministry of Education, Singapore. (2025). Lower Secondary Science Syllabus.

[2] Lee, S. Y. (2024). Contextualization in Science Education: Singapore Perspectives. Springer.

[3] Chen, Z. M. (2026). Application of cognitive conflict strategies in physics conceptual change. Global Education Outlook, (1).

[4] UNESCO. (2025). Low-Cost Science Experiments for Developing Countries.

[5] Tan, K. C. D. (2025). Innovative pedagogies for science education in Singapore. In Proceedings of the International Symposium on Research in Educational Sciences.