Problem based learning is learner centered approach to teaching and learning in which the
learners learn about a subject through problem-solving.
In a problem based learning model, student engage complex, challenging problems and
collaboratively work toward their resolution.
PBL is about students connecting disciplinary knowledge to real world problems --
motivation to solve a problem becomes the motivation to learn.
Objectives:
A. Identify changes in the materials that are useful or harmful to the environment.
B. Describe the harmful effects of the changes in the materials to he environment.
C. Suggest some ways of preventing/minimizing the harmful effects of the changes in
the materials to the environment.
Subject:
Topic: Changes in the materials that are useful or harmful to one’s environment.
Reference: science 4 TG p. 61-66
Teaching procedure:
A. Preliminary drill
Prayer
Greetings
Attendance
Classroom rules
Energizer
B. Review
Okay pupils, before we move on to our next lesson let’s take a look on what we had
discuss yesterday…
Who can tell me what we had discuss yesterday?
------ the change in the properties of the materials when mixed with other materials.
When the materials is mixed with other materials, each of the combined/mixed
materials can be easily identified/distinguished form one another. This mixture is
called?
----- heterogeneous mixture maam
--example - salad, pizza, sandwich
Some materials when mixed with other materials, cannot be distinguished from each
other. If the resulting mixture looked the same throughout, what such mixture is called?
-----homogeneous mixture maam
--- coffee, milkshake, orange juice
