MULTIPLE REPRESENTATIONS IN SCIENCE

Understanding the Difficulty of Science

Science can often be perceived as difficult to understand due to explanations that extend beyond our immediate experiences.
Explanations for phenomena often involve complex concepts at the:
- Sub-microscopic level - such as molecular interactions.
- Macroscopic level - understanding the world as a whole.
The use of analogies is important to bridge the gap between familiar experiences and abstract scientific concepts.
- Analogies help in understanding by relating new ideas to known experiences.

There are three main strategies for teaching science:
1. Denoting Conceptions
2. Affording Experience
3. Implementing Analogies

Denoting conceptions involves:
- Communicating scientific phenomena through lectures and explanations.
- Tools include:
  - Projected formulas
  - Diagrams of processes and molecular reactions.
This method can be complex for students:
- They must independently find experiences related to the concept.
- Students often struggle to create analogies by themselves.

Affording experience enriches the learning environment:
- Uses tools like microscopes, videos, or field trips.
- Helps students relate abstract concepts to tangible experiences.
However, providing experiences alone is not sufficient:
- Students need guidance to interpret these experiences.
- Educators must help integrate these experiences into the students' knowledge base.

Using and reflecting on analogies:
- Creates connections between experience and abstract concepts.
- Involves collaborative reflections with students on the implications and limits of analogies.
Requires careful consideration of what the analogy emphasizes or obscures.

A study analyzed the teaching methods used in 16 biology lessons across 5 schools:
- Found a significant reliance on denoting conceptions, which is often the least effective for student understanding.
- Initial assumptions underestimated the integration of afforded experiences; experiences were often superficial (e.g., nice images with no clear task relevance).
- Analogies were frequently presented but not discussed meaningfully with students.

To enhance science education, it’s critical to:
- Integrate the three methods effectively:
  - Denote conceptions with clarity while connecting to students’ experiences.
  - Afford experiences that are relevant and engaging.
  - Implement and reflect on analogies, ensuring they help clarify concepts.
Utilizing a triplet of these methods can significantly improve students' understanding of scientific concepts.