5 E model is a widely used method of teaching using the constructivist approach. A lesson plan is presented here for a 5 E model has been presented here taking the example of photosynthesis. The activities in each stage of the 5 stages have been explained.

1. 5E MODEL LESSON PLAN -
BIOLOGY
DR. M. PADMAVATHI

2. Experiment to show that oxygen
is released during photosynthesis
Class: IX
Subject: Biology

3. Learning points
 All green plants prepare food by the process of photosynthesis
 Photosynthesis requires CO2, water, chlorophyll and water
 During the process of photosynthesis oxygen is released
 Setting up an experiment that shows oxygen is released during
photosynthesis
 Observes the release of oxygen in the form of bubbles
 The release of oxygen can be proved with the help of an
experiment

4. Learning outcomes:
 Recalls the term ‘photosynthesis’
 Lists the factors necessary for photosynthesis
 Identifies the products of photosynthesis
 Constructs an experiment to show that oxygen is released
during photosynthesis
 Observes that oxygen is released in the form of bubbles
 Evaluates that the gas released during photosynthesis is
Oxygen

5. Management of learners
 The students are divided into 5 groups of 5 students each
 One student from each group is chosen as leader of the group
 Students are given instruction on what they have to do
 The leader of the group writes down the observation done by
the group

6. Learning resources
The following are the materials required for conducting the experiment. Each
group is provided with a set of these materials to conduct the experiment
 Water
 Beaker
 Hydrilla plant
 Glass funnel
 Test tube
 Pond water

7. Evidence for learning:
 Observation recorded by the students in the data sheet
 Questions answered by the students while the experiment is
being conducted and during the ‘elaborate’ stage of the lesson.
 Observation by the teacher during each stage of the lesson.

8. 1. Engage: 5 min
Teacher greets the students. Teacher asks a few questions related to the
process of photosynthesis to understand the previous knowledge of the
students.
 Why plants are called autotrophs?
 What is photosynthesis?
 What are the essential requirements for photosynthesis?
 What gas is released during photosynthesis?
 Students are divided into groups of four
 All groups are supplied with material to set up the experiment
 Students are instructed on how to record observation in the data
sheet.

9. 2. Explore: 20 min
 Students are shown how to set the apparatus to prove that oxygen is
released during photosynthesis. Students have to observe and count the
number of bubbles released at an interval of 3 minutes.
 Students try to set up the experiment.
 Ask students to note down the initial level of water in the test tube
 Students are asked to observe the release of bubbles and note down the
number of bubbles with an interval of 3 minutes
 Students note the number of bubbles released during the process
 Students note down the final level of water in the test tube

10. 3. Explain: 5 min
Teacher asks the leader of each group about their observation.
Each leader gives observation of their group on
 The initial level of the water in the test tube
 The number of bubbles released at an interval of 3 minutes
 The final level of water in the inverted test tube.

11. Expand: 5 min
In this stage the teacher asks a few questions to expand the students’ knowledge. The questions are
framed in such a way to make students think and deeper into the content. The knowledge gained can be
applied in various similar situations.
The questions are
 Why Hydrilla plants are used in this experiment?
They are aquatic plants and can do photosynthesis inside the water
 Why pond water is used?
It is a source of carbonates, contains dissolved Co2.
 If a pinch of baking soda is added to the water in the experimental setup what change you can notice
in the result of this experiment?
More bubbles may be released due to increased rate of photosynthesis

12. Expand contd….
 Instead of pond water if distilled water or boiled and cooled tap
water is used what will be the result of the experiment?
Distilled water lacks dissolved Co2 in it. No evolution of O2 occurs
as no photosynthesis takes place.
 How can we confirm the collected gas in the test tube as
oxygen?
A glowing splinter when introduced into the test tube containing
the collected oxygen gas, will glow bright.

13. Evaluate
 The data collected by the students and the discussion
 Oral answers given by the students
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