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SCHEME OF WORK
Biology
Form 2 2025
TERM III
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1

Revision

2 1
RESPIRATION
Introduction ? Definition and importance of respiration.
By the end of the lesson, the learner should be able to:
By the end of the lesson, the learner should be able:
To define respiration.
To explain significance of respiration.
Q/A: Definition

Brief discussion of significance of respiration.
text book
K.L.B. BK 2
PP. 73-74
2 2-3
RESPIRATION
Burning food.
The mitochondrion.
Aerobic respiration.
By the end of the lesson, the learner should be able to:
To describe an experiment investigating the gas given off when food is burnt.
To explain phases of aerobic respiration.
To state difference between aerobic and anaerobic respiration.
Teacher demonstration: Burning a food sample.
Testing for the gas evolved during combustion.
Detailed discussion.
Writing down equations of food breakdown.
text book
Wall charts- The mitochond-rion
K.L.B. BK 2
PP. 73-74
K.L.B. BK 2
PP.74-76
2 4
RESPIRATION
Anaerobic respiration.
By the end of the lesson, the learner should be able to:
To describe anaerobic respiration.
Observe set up experiments.
Detailed discussion punctuated with probing questions:
Glucose
Yeast
Thermometer
K.L.B. BK 2
P.77
3 1
RESPIRATION
Oxygen ?debt?.
By the end of the lesson, the learner should be able to:
To explain the term ?oxygen debt?.
To explain the effect of ?oxygen debt? on the amount of energy released during respiration.
Probing questions.

Detailed discussion.
text book
K.L.B. BK 2
P.78
3 2-3
RESPIRATION
Applications of anaerobic respiration.
By the end of the lesson, the learner should be able to:
To explain applications of anaerobic respiration.
Q/A: Products of fermentation process.
Listing down various applications of anaerobic respiration.
text book
K.L.B. BK 2
P. 79
3 4
RESPIRATION
Respiratory substrates & respiratory quotient.
Rate of respiration.
By the end of the lesson, the learner should be able to:
To identify respiratory substrates in the body.
To define respiratory quotient.
To calculate R.Q.
Brief discussion/ explanations.

Exposition of definition and its significance.
Problem solving.
text book
K.L.B. BK 2
P. 79
4 1
EXCRETION AND HOMEOSTASIS
Introduction- Definition and importance of homeostasis and excretion.
By the end of the lesson, the learner should be able to:


To define homeostasis and excretion.
To explain necessity of excretion in plants and animals.


Q/A: Definitions of digestion, ingestion and egestion, secretion and excretion.

Discuss importance of excretion in plants and animals.
text book
K.L.B. BK 2
PP. 83-84
4 2-3
EXCRETION AND HOMEOSTASIS
Excretion in plants.
Excretion and homeostasis in unicellular organisms.
By the end of the lesson, the learner should be able to:
To name plants excretory products.
To state uses of excretory products of plants.

Describe excretion and homeostasis in an amoeba and a paramecium.
Probing questions.
Exposition of new terms.
Discuss uses and abuses of plant excretory products.
Q/A: Review diffusion, structure of an amoeba.
Discuss excretion and homeostasis in an amoeba and a paramecium.
Some plants excretory products.
text book
K.L.B. BK 2
PP. 83-84
K.L.B. BK 2
PP. 84-85
4 4
EXCRETION AND HOMEOSTASIS
Excretion and homeostasis in unicellular organisms.
By the end of the lesson, the learner should be able to:
Describe excretion and homeostasis in an amoeba and a paramecium.
Q/A: Review diffusion, structure of an amoeba.
Discuss excretion and homeostasis in an amoeba and a paramecium.
text book
K.L.B. BK 2
PP. 84-85
5 1
EXCRETION AND HOMEOSTASIS
Excretion and homeostasis in animals.
By the end of the lesson, the learner should be able to:
To identify excretory organs in various animals.
Exposition and discussion.
Observe drawings of various animals showing excretory organs.
Specimens of platyhelmin-thes, annelida, insects.
K.L.B. BK 2
P. 85
5 2-3
EXCRETION AND HOMEOSTASIS
The mammalian skin.
By the end of the lesson, the learner should be able to:
Draw and label the structure of the mammalian skin.
To describe functions of parts of the mammalian skin.

Permanent slides of mammalian skin.
K.L.B. BK 2
PP. 86-87
5 4
EXCRETION AND HOMEOSTASIS
The lungs.
By the end of the lesson, the learner should be able to:
To explain the role of lungs as excretory organs.
Exposition and discussion.
Chart/ model- Mammalian lungs.
K.L.B. BK 2
P. 87
6 1
EXCRETION AND HOMEOSTASIS
The kidneys structure.
By the end of the lesson, the learner should be able to:
To describe the external structure of kidney.
To describe the internal structure of the kidney.
Observe external features of a kidney.
Observe internal drawing and labeling of the kidney.
Wall-Charts?internal organs of a kidney.
K.L.B. BK 2
PP. 89-90
6 2-3
EXCRETION AND HOMEOSTASIS
The nephron.
Urine formation.
By the end of the lesson, the learner should be able to:
Describe features of the nephron.
To explain formation of urine.
Discuss features of the nephron.
Draw structure of the nephron.
Label the diagram.
Detailed discussion.
Chart?Kidney nephron.

K.L.B. BK 2 PP 90
6 4
EXCRETION AND HOMEOSTASIS
The loop of Henle.
By the end of the lesson, the learner should be able to:
To explain the function of the loop of Henle; and how it?s adapted to its function.
To discuss the role of ADH in determination of concentration of urine.
Discussion and explanations.

Probing questions.
Chart-
The nephron.
K.L.B. BK 2 PP 91-92
7 1
EXCRETION AND HOMEOSTASIS
Kidney diseases and disorders.
The Liver.
By the end of the lesson, the learner should be able to:
To name kidney diseases and disorders and state methods of prevention and / treatment.
Discussion and Explanations.
text book
Chart-Structure of the liver
K.L.B. BK 2 PP 92
7 2-3
EXCRETION AND HOMEOSTASIS
Deamination.
Other functions of the liver.
Liver disorders.
By the end of the lesson, the learner should be able to:
To explain the function of the liver in deamination.
To state and explain other functions of the liver.
Probing questions.

Discussion
Probing questions.
Discussion
text book
K.L.B. BK 2 PP 95
K.L.B. BK 2 PP 95-96
7

Mazingira day

8 1
EXCRETION AND HOMEOSTASIS
Homeostasis.
By the end of the lesson, the learner should be able to:
To define the concepts of internal environment and homeostasis.
Exposition and discussion.
text book
K.L.B. BK 2 PP 97-98
8 2-3
EXCRETION AND HOMEOSTASIS
The feedback mechanism.
The hypothalamus.
The skin and thermoregulation.
By the end of the lesson, the learner should be able to:
To differentiate between positive and negative feedback and state their roles in maintaining the desirable point.


To explain the function of the skin in thermoregulation.
Schematic representation of feedbacks.

Exposition and discussion.
Chart-
Schematic diagram of feedback mechanism
text book
K.L.B. BK 2 PP 97-98
K.L.B. BK 2 PP 98
8 4
EXCRETION AND HOMEOSTASIS
Blood vessels and their functions in thermo-regulation.
By the end of the lesson, the learner should be able to:
To explain the adaptation of blood vessels and their function in thermo-regulation.
Exposition and discussion.
Drawing schematic diagrams.
text book
K.L.B. BK 2 PP 98-99
9

End term exams

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