LET Science Teaching Strategies: Teacher Demonstration
Prepare for the Licensure Examination for Professional Teachers (LET/LEPT) with this Professional Education practice question. Learn how to distinguish Teacher Demonstration from Laboratory Activity, Investigatory Activity, and Problem Solving.
1. LET Practice Question
Question:
Miss Felnie wants to let her class learn that in the formation of ice cubes, the surrounding surface of the water freezes first before the others and to show that water expands rather than contracts when frozen. Which of the following is the most appropriate teaching strategy for her to use?
- Problem Solving
- Laboratory Activity
- Investigatory Activity
- Teacher Demonstration
2. Correct Answer: D. Teacher Demonstration
Teacher Demonstration is the most appropriate answer because the teacher performs an experiment or illustrates a scientific phenomenon while the students observe the process and results.
3. Detailed Explanation
A teacher demonstration is a teaching strategy in which the teacher performs an experiment, procedure, or activity in front of the learners. Students observe what happens, identify important details, and discuss the results with the guidance of the teacher.
In this situation, Miss Felnie wants to show how water freezes and expands when it becomes ice. She can conduct a demonstration using an appropriate container and a freezing process, then guide the students in observing the changes.
Water has an unusual property: under ordinary atmospheric pressure, it expands when it freezes. Ice is less dense than liquid water, which is why ice floats. In a typical ice cube tray, freezing generally begins near the colder surfaces, including the exposed surface and the sides of the container. The exact freezing pattern depends on the container and cooling conditions.
The important clue in the question is that the teacher wants to show the scientific phenomenon to the class. This makes Teacher Demonstration the best answer among the given choices.
4. Analysis of All Choices
A. Problem Solving
Problem Solving is a strategy that encourages learners to identify a problem, analyze relevant information, consider possible solutions, and arrive at a reasonable conclusion. It is not the primary activity described in the question.
B. Laboratory Activity
Laboratory Activity involves learners performing experiments and hands-on tasks themselves. It is appropriate when students are expected to personally manipulate materials, conduct procedures, and record observations.
C. Investigatory Activity
Investigatory Activity involves systematic inquiry into a question or phenomenon. Learners may formulate questions or hypotheses, gather evidence, conduct investigations, and draw conclusions.
D. Teacher Demonstration – Correct Answer
Teacher Demonstration is appropriate when the teacher performs the experiment or illustrates a process while students observe and analyze the results. This directly matches Miss Felnie's stated purpose.
5. Important Teaching Concepts to Remember
- Teacher Demonstration: The teacher performs an activity or experiment for learners to observe.
- Laboratory Activity: Learners personally perform experiments or hands-on procedures.
- Investigatory Activity: Learners systematically investigate a question or phenomenon.
- Problem Solving: Learners use reasoning and strategies to address a problem.
6. Classroom Application
Suppose a science teacher wants to explain why ice floats in water. The teacher may place an ice cube in a transparent glass of water and ask students to observe what happens.
The teacher can then explain that ice is less dense than liquid water because water expands as it freezes. This demonstration makes an abstract scientific concept easier to understand through direct observation.
For a more learner-centered laboratory activity, students could conduct the experiment themselves under appropriate supervision and record their observations.
7. LET Exam Tips
When answering questions about teaching strategies, identify who performs the main activity and what learners are expected to do.
- If the teacher performs an experiment while learners observe, consider Teacher Demonstration.
- If learners personally perform an experiment, consider Laboratory Activity.
- If learners systematically investigate a research question, consider Investigatory Activity.
- If learners work toward finding solutions to a problem, consider Problem Solving.
Memory Aid: Teacher Demonstration = Teacher shows. Laboratory Activity = Learners do.
8. Frequently Asked Questions
1. What is Teacher Demonstration?
It is a teaching strategy in which the teacher performs a process, procedure, or experiment while learners observe and analyze what happens.
2. What is the difference between Teacher Demonstration and Laboratory Activity?
In Teacher Demonstration, the teacher performs the activity while students primarily observe. In Laboratory Activity, students perform the experiment themselves.
3. Why does water expand when it freezes?
As water freezes, its molecules form an organized crystal structure that occupies more space than the same mass of liquid water. This makes ice less dense than liquid water.
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