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LESSON PLAN
Educational Unit : Junior High School 2 Semarang
Subject
: Natural Science
Class / semester : VIII (eight) / 1
Theme
: Organ System
Topic
: Digestive System
Sub Topic
: The Human Digestive System
Time
: 25 minutes
A. CORE COMPETENCE
1. Appreciate and practice the teachings of their religion.
2. Respect and appreciate the honest behavior, discipline, responsibility, caring (tolerance,
mutual assistance), mannered, confident, in interacting effectively with the social and
natural environment within reach of the association and its existence.
3. Understand of knowledge (factual, conceptual and procedural) by curiosity about
science, technology, art, cultural phenomena and events related to the visible.
4. Try, process, and present in the realm of the concrete (use, parse, compose, modify, and
make) and the realm of the abstract (writing, reading, counting, drawing, and writing) in
accordance with the learned in school and other sources in the same viewpoints /
theories.
B. BASIC COMPETENCE
1.1 Admire the order and complexity of God's creation on the physical and chemical aspects
of life in the ecosystem, and the role of humans in the environment and make it happen
in practice the teachings of their religion.
2.1 Demonstrate behavioral science (curiosity; objective; honest; careful; meticulous;
diligent; careful; be responsible; open; critical; creative; innovative and caring
environment) in their daily activities as a form of implementation of the attitude of doing
experiment and discussion.
2.2 Appreciate the work of individuals and groups in their daily activities as a form of
implementation conducting experiments and report experimental results.
2.3 Demonstrate thoughtful and responsible behavior in their daily activities as a form of
implementation of the attitude in choosing healthful foods and beverages and do not
damage the body.
2.4 Show appreciation to others in their daily activities as a form of implementation of the
award to people who sell healthy food without additives dangerous mix.
3.6 Describe the digestive system as well as its association with the respiratory system,
circulatory system, and energy usage food.
4.6 Conduct investigations of mechanical and enzymatic digestion on food.
C. INDICATORS OF LEARNING
3.6.1 Mention the organ that make up the digestive system with critical and cooperative.
3.6.2 Explain process the human digestive with independently and responsibility.
D. LEARNING OBJECTIVES
1. Students can mention the organ that make up the digestive system
2. Students can explain the process of digestion in the human body.
E. MATERIAL
The digestive system breaks food down into molecules the body can use. Proteins are
split into amino acids. Carbohydrates are reduced to simple sugars. Fats are split into
glycerol and fatty acids. These nutrients are then absorbed into the blood and transported to
all the cells of the body.
The digestive system is a group of organs that takes in and digests food, and
eliminates solid wastes. The organs of digestive system are the mouth, pharynx, esophagus,
stomach, liver, gallbladder, pancreas, large intestine, small intestine, appendix, rectum, anus.
1. Chemical digestion begins in the mouth with salivary amylase in saliva splitting complex
carbohydrates into simple carbohydrates.
2. The pharynx the next destination for food you've eaten. From here, food travels to
the esophagus.
3. By means of a series of contractions, called peristalsis, the esophagus delivers food to
the stomach.
4. The stomach is a sac-like organ with strong muscular walls. The stomach secretes acid
and powerful enzymes that continue the process of breaking down the food. From there
the food moves to the small intestine.
5. Small Intestine consist of three segments, the duodenum, jejunum, and ileum. The small
intestine continues the process of breaking down food by using enzymes released by the
pancreas and bile from the liver.
6. Muscles push these waste products into the large intestine. The large intestine absorbs
water and any remaining nutrients and changes the waste from liquid into stool. The
final section of the large intestine, terminating at the anus. The anus stores stool until it
pushes stool out of the body during a bowel movement.
F. APPROACH / STRATEGY / LEARNING METHOD
1. Approach
: Scientific learning
2. Method
: Explanation, answer and question, discussion
3. Model
: Problem Based Learning
G. EQUIPMENT, MEDIA AND RESOURCES
1. Equipment: LCD, laptop, material
2. Media:
a) Picture of the digestive tract
b) Power point
c) Worksheet
3. Learning Resources :
a. Karim, Saeful. 2009. Membuka Cakrawala Alam Sekitar Untuk Kelas VII. Jakarta :
Pusat Perbukuan, Departemen Pendidikan Nasional.
b. Kementerian Pendidikan dan Kebudayaan. 2013. Ilmu Pengetahuan Alam Untuk
SMP/MTs Kelas VII. Jakarta : Katlog Dalam Terbitan ( KDT ).
c. Sugiyarto, Teguh. 2008. Ilmu Pengetahuan Alam 1 Untuk SMP/MTs Kelas VII.
Jakarta : Pusat Perbukuan, Departemen Pendidikan Nasional.
H. LEARNING ACTIVITIES
Steps of Problem Based
Activity
Description of Activity
Time
Learning
Open
the 1. Teacher
orient Creating a situation (Stimulation)
5 minutes
lesson
students on issues
Concentration:
a. Teacher greeting and open class
with prayer
b. Teacher give students the
attention and motivation to
follow the spirit of the lesson
c. Teacher presents the objectives
and benefits of studying the
digestive system
d. Teacher give apperception
“are you fasting today? And
then have you ever had predawn meal? And what do you
feel if you not pre-dawn meal
and not eaten all the day? Why?
What the reason?”
Core Activity
Close
lesson
2. Teacher
organize
students to learn
3. Teacher
guide
students in group
investigation
to
gather
the
appropriate
information
4. Students
Develop
and
present
worksheet
5. Teacher and students
analyze and evaluate
the problem solving
process
Observe :
15
 Students watch the picture minutes
about the digestive tract
Ask :
 What is the digestion of food?
 What are the organs that
contribute in the digestive
system?
Explore :
 Students make a group consist of
3 to 4 students
 Students explore knowledge by
picture
Association :
 Each group received a different
digestive organs
 Students discuss in groups about
the digestive process that occurs
in the organ
Communication :
 Students present the results of
discussions
the 6. Teacher and students a. Students and teacher review the 5 minutes
conclude the material
results of learning activities
b. Teacher give rewards (ex, praise
or other relevant form of
respect) to the group that
performs well
c. Teacher and students conclude
the material
I. Assessment
a) Cognitive assessment
Examples of Instruments Multiple Choice
Check the correct answer to each question.
1. How does saliva digest food?
a. by breaking down starches
b. by using bile to break down sugars
c. by breaking down proteins
d. by using peptides to break down fat
2. The first segment of the small intestine is called the:
a. villus
c. colon
b. duodenum
d. ileum
3. The volume of the human stomach is approximately:
a. one liter
c. one-half of a liter
b. two liters
d. four liters
4. What are the walls of the stomach lined with?
a. blood vessels and bile ducts
b. villi and mucus membranes
c. blood vessels and intestinal glands
d. lymph vessels and villi
5. Enzymes in the gastric juices break proteins down into:
a. lipids
c. amylase
b. amino acids
d. simple sugars
6. What type of food begins the digestion process in the small intestine?
a. starches
c. sugars
b. proteins
d. fats
7. What happens in the duodenum?
a. food is mixed with pancreatic juice and bile
b. vitamins and minerals are absorbed
c. food is crushed by strong muscles and mixed with digestive juices
d. a large amount of water is absorbed from the food
8. What are the functions of the intestinal juices?
a. to continue breaking down starches and proteins
b. to begin breaking down fats
c. to begin breaking down starches and proteins
d. to break down vitamins and minerals
9. Where do amino acids and glucose go after being absorbed by the villi?
a. to the gallbladder
b. to the large intestine
c. to the liver
d. to the lymph vessels
10. Blood vessels in the large intestine absorb:
a. protein
c. bile
b. minerals and water
d. straches
The answer key questions of multiple choice
1. A
6. D
2. B
7. A
3. B
8. A
4. C
9. C
5. B
10. B
Total maximum score multiple choice 100
Category value:
Predicate
Value
very good (A)
81-100
good (B)
71-80
enough (C)
61-70
less (K)
< 60
b) Instrument Rating Affective
Instrument Attitude Observation
No
Name
Attitude
Independently Responsibility Critical
Cooperative
1
2
3
4
Rubric Assessment of Attitude
No
Attitude
1.
Cooperation
2.
Critical
3.
Independently
4.
Responsibility
Explanation :
1
Can’t cooperate
in group well.
Ask a question
but
not
according with
the topic.
Not
independently
in
learning
process.
Unable
to
responsibility.
Score
2
Not good enough
cooperate in group.
Ask a question but not
accordance
enough
with the topic.
3
Can cooperate in
group well.
Ask a question
about the topic
clearly.
Independently
in
learning process but
not serious
Independently
in
learning process.
Unable enough
responsibility.
Able
responsibility.
to
to
Assessment scale made by part of the way 1 until 3. 1 = less, 2=enough, 3=good. For
attitude assessment, this numeral have a function as summary tools the profile of
students, not to dead value of Minimal Complete Criteria.
Value=(score/15)*100
Category A (very good)
= for value >79
Category B (good)
= for value 65-79
Category C (enough)
= for value 50-64
Category (less)
= for value 35- 49
Category (very less)
= for value 20-34
c) Instrument Rating Psychomotor
No
1
3
4
Valuation
1
2
3
Aspect
Skill in discussion
Discussion result
Conclusion of discussion
Rubric Assessment of Psychomotor
Aspect
1
Skill in discussion
Students
only
looking his friend
was discuss.
Discussion result
The data is not
refer
to
the
discussion result
which
accurate,
complete,
and
save.
Conclusion
discussion
of The conclusion of
discussion is false.
Valuation
2
Active in discussion
but not according
with
the
instruction.
The data only refer
two aspect from
accurate,
complete,
save,
and still mixing the
data
with
inference.
The conclusion is
true
but
not
complete.
3
Active in discussion
and according with
the instruction.
The data refer to
discussion result
which
accurate,
complete,
and
save.
The
conclusion
true and complete.
Value
= (score/9)*100
Minimum score
=3
Maximum score = 9
Maximum value = 100
Category A (very good)
= for value >76
Category B (good)
= for value 66-76
Category C (enough)
= for value 55-65
Category (less)
= for value 44- 54
Category (very less)
= for value 33-43
Semarang, on 9 June 2016
Headmaster of SMP N 2 Semarang
Stephani Diah P, M.Hum
NIP.
Science Teacher
Shofia Aini