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Biology
Form 3 2025
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
2 1
ECOLOGY
Ecological pyramids of numbers.
Constructing Pyramid of numbers from given data.
By the end of the lesson, the learner should be able to:
To represent feeding relationships and energy flow using pyramids of numbers.
Q/A: Review trophic levels.
Teacher explains features of pyramid of numbers.
chart
text book
KLB BK III. PP 41-42. CERTIFICATE PG 49
2 2
ECOLOGY
Inverted pyramid of numbers.
By the end of the lesson, the learner should be able to:
Give examples where an inverted pyramid of numbers exists; giving reasons thereof.
Representing inverted pyramid of numbers diagrammatically.
Chart- Inverted pyramid of numbers.
KLB BK III. PP 43-44 CERTIFICATE PG 50
2 3
ECOLOGY
Pyramid of Biomass.
Population.
By the end of the lesson, the learner should be able to:
To define biomass of an organism.
To interpret the pyramid of biomass.
To construct a biomass from given data.
Teacher exposes new concepts; then leads in a detailed discussion.

Students construct biomass from given data.
chart
text book
KLB BK III. PP 44-45. CERTIFICATE PG 50
2 4
ECOLOGY
Quadrat method of estimating population.
Quadrat method of estimating population.
By the end of the lesson, the learner should be able to:
To describe the quadrat method of estimating population.
To suggest limitations of quadrat method of estimating population.
Teacher explains use of quadrat method of estimating population.
Q/A: limitations of quadrat method of estimating population.
Project- students to make quadrats.

text book
Standard quadrats.
KLB BK III. PP 46-47. CERTIFICATE PG 62
2 5
ECOLOGY
Line - transect method of estimating population.
By the end of the lesson, the learner should be able to:
To describe the line transect method of population.
To suggest limitations of line transect method of population.
Teacher explains procedure of line transect method of population.
Q/A: Students suggest limitations of line transect method of population.
text book
KLB BK III.
PP 47-48. CERTIFICATE PG 63
3 1
ECOLOGY
Belt transect method of estimating population.
Capture-recapture method.
By the end of the lesson, the learner should be able to:
To estimate population using belt transect method of population.
Group work ? outdoor activity.
Discussion.
Tape measure, quadrats, pegs, thermometer, pH indicator, e.t.c
specimen
KLB BK III. PP 48-49. CERTIFICATE PG 63
3 2
ECOLOGY
Xerophytes.
By the end of the lesson, the learner should be able to:
To state characteristics of dry habitats.
To identify adaptations of xerophytes to their habitats.
Q/A: Characteristics of dry habitats.
Discussion: Adaptations of xerophytes to dry habitats.

Specimens of xerophytes.
KLB BK III. P 50. CERTIFICATE PG 64
3 3
ECOLOGY
Mesophytes.
Hydrophytes.
By the end of the lesson, the learner should be able to:
To state characteristics of habitats of mesophytes.

To explain adaptations of mesophytes to their habitats.
Q/A: Characteristics of habitats where mesophytes thrive.

Discussion: Adaptations of mesophytes to their habitats.
Specimens of mesophytes.
Specimens of hydrophytes.
KLB BK III. P 51. CERTIFICATE PG 69
3 4
ECOLOGY
Halophytes.
By the end of the lesson, the learner should be able to:
To state characteristics of habitats of halophytes.
To explain adaptations of halophytes to their habitats.
Q/A: Characteristics of dry habitats.
Discussion: Adaptations of dry habitats.
Specimens of halophytes.
KLB BK III. P 52. CERTIFICATE PG 68
3 5
ECOLOGY
Adaptive features of plants.
By the end of the lesson, the learner should be able to:
Group experiments- Students examine given specimens and suggest their habitats.
Identify adaptive features.
Xerophytes Mesophytes
Hydrophytes
Hand lenses.
KLB BK III. P 50. CERTIFICATE PG 69
4 1
ECOLOGY
Pollution and its effects.
By the end of the lesson, the learner should be able to:
To define pollution, pollutants.
To explain effects of pollution on human beings and other organisms.
Discussion punctuated with Q/A.
text book
KLB BK III. P 55. CERTIFICATE PG 70
4 2
ECOLOGY
Air pollution.
By the end of the lesson, the learner should be able to:
To identify causes and effects of air pollution.
To suggest control measures of air pollution.

Detailed discussion & probing questions.
topic related video
KLB BK III. PP 56-59. CERTIFICATE PG 70
4 3
ECOLOGY
Air pollution.
By the end of the lesson, the learner should be able to:
To identify causes and effects of air pollution.
To suggest control measures of air pollution.

Detailed discussion & probing questions.
topic related video
KLB BK III. PP 56-59. CERTIFICATE PG 70
4 4
ECOLOGY
Water pollution.
Soil pollution.
By the end of the lesson, the learner should be able to:
To identify causes and effects of water pollution.
To suggest control measures of water pollution.

Detailed discussion & Q/A.
video of water pollution
text book
KLB BK III. P 60. CERTIFICATE PG 77
4 5
ECOLOGY
Radioactive emissions.
By the end of the lesson, the learner should be able to:
To identify effects of radioactive emissions.
To state uses of nuclear energy.
Brief discussion on radioactive emissions and nuclear energy
text book
KLB BK III. P 62. CERTIFICATE PG 72
5 1
ECOLOGY
Human diseases. Typhoid & cholera.
By the end of the lesson, the learner should be able to:
To identify disease predisposing factors.
To describe causative agents, symptoms, prevention of bacterial diseases.

Detailed discussion with probing questions.

text book
KLB BK III. P 63. CERTIFICATE PG 82
5 2
ECOLOGY
Protozoan diseases.
By the end of the lesson, the learner should be able to:
To identify causal agents, symptoms, prevention and treatment of amoebic dysentery and malaria.
Detailed discussion, Q/A.
magazine
KLB BK III. PP 66. CERTIFICATE PG 83
5 3
ECOLOGY
Prevention and control of protozoan diseases.
By the end of the lesson, the learner should be able to:
To explain methods of preventing and controlling protozoan diseases.
CERTIFICATE PG  83
5 4
ECOLOGY
Ascaris lumbricoides.
Bilharzia.
By the end of the lesson, the learner should be able to:
To identify adaptive features of Ascaris lumbricoides.
To state and explain effects of a parasite on the host.
To suggest preventive and control measures.
Group activities: Students examine preserved specimens of Ascaris lumbricoides and identify some adaptive features.

Detailed discussion.
Preserved specimens of Ascaris lumbricoides.
chart
KLB BK III. P 67. CERTIFICATE PG 87
5 5
REPRODUCTION IN PLANTS AND ANIMALS
Introduction
By the end of the lesson, the learner should be able to:
To differentiate between sexual and asexual reproduction.
To state importance of reproduction.


Q/A: Defination of reproduction.
Teacher illustrates and explains sexual and asexual reproduction.
text book
KLB BK III. P 78. CERTIFICATE PG 99
6 1
REPRODUCTION IN PLANTS AND ANIMALS
Cell division.
By the end of the lesson, the learner should be able to:
To define genes and chromosomes.
To describe the role of chromosomes in cell division.
Detailed discussion.
chart
KLB BK III.
P 79. CERTIFICATE PG100
6 2
REPRODUCTION IN PLANTS AND ANIMALS
Mitosis.
By the end of the lesson, the learner should be able to:
To describe the process of mitosis.
Teacher leads in a detailed discussion.
Drawing diagrams showing stages of mitosis.
charts
KLB BK III.
P 80. CERTIFICATE PG 100
6 3
REPRODUCTION IN PLANTS AND ANIMALS
Mitosis in a young root tip.
Significance of mitosis.
By the end of the lesson, the learner should be able to:
To describe an experiment to show mitosis in a young root tip.
Group experiments: Observing different stages of mitosis. Drawing cells showing stages of mitosis.

Comparing drawn cells with those previously drawn.
Onion root tip.
Microscope
IM HCl
Cover slides.
text book
KLB BK III.
P 80. CERTIFICATE PG 102
6 4
REPRODUCTION IN PLANTS AND ANIMALS
Meiosis.
By the end of the lesson, the learner should be able to:
To distinguish meiosis from mitosis.
To explain the principle underlying meiosis.
Explanations
text book
KLB BK III.
P 82. CERTIFICATE PG 103
6 5
REPRODUCTION IN PLANTS AND ANIMALS
First and second meiotic divisions.
By the end of the lesson, the learner should be able to:
To describe the processes of first and second meiotic divisions.
Explanations and drawing diagrams.
Chart- stages of second meiotic division.
KLB BK III.
P 82. CERTIFICATE PG 104
7 1
REPRODUCTION IN PLANTS AND ANIMALS
Meiosis in plant cells.
Significance of meiosis.
By the end of the lesson, the learner should be able to:
To identify various stages of meiosis.
Group experiments- meiosis in young flower bulbs.
Drawing cells showing stages of meiosis.
Comparing drawn cells with those previously drawn.
Flower buds
IM HCl
Source of heat
Glass slide
Filter paper
Microscope
KLB BK III.
P 82. CERTIFICATE PG 105
7 2
REPRODUCTION IN PLANTS AND ANIMALS
Asexual reproduction. Binary fission.
By the end of the lesson, the learner should be able to:
To identify types of asexual reproduction.
To describe the stages of binary fission in amoeba.
Exposition and discussion.

Drawing diagrams/ discussion.
Chart- Binary fission in amoeba
KLB BK III.
P 87.CERTIFICATE PG 113
7 3
REPRODUCTION IN PLANTS AND ANIMALS
Spore formation.
Budding.
By the end of the lesson, the learner should be able to:
To describe the process of spore formation in bread// ugali mould.
Mould on bread /ugali.
Identify and draw hyphae and sporangia.
Microscope bread/ ugali mould
Hand lens.
KLB BK III.
P 88.CERTIFICATE PG 114
7 4
REPRODUCTION IN PLANTS AND ANIMALS
Budding in yeast.
By the end of the lesson, the learner should be able to:
To explain conditions necessary for budding in yeast.
Identifying, drawing and labeling yeast cells.
Previously prepared 10% sugar solution
Methylene blue
Microscope
KLB BK III.
P 89.CERTIFICATE PG 113
7 5
REPRODUCTION IN PLANTS AND ANIMALS
Sexual reproduction in plants. Structure of a flower.
By the end of the lesson, the learner should be able to:
To draw and label a flower.
Group experiments- Examine flowers and identify parts.
Counting number of sepals, petals, stamen, carpels.
Bean flower
Morning glory
Bauhinia Longitudinal section of a general flower.
KLB BK III.
P 90.CERTIFICATE PG 117
8 1
REPRODUCTION IN PLANTS AND ANIMALS
Flower terminologies.
By the end of the lesson, the learner should be able to:
To explain terms related to flowers.
Exposition of new concepts.
Teacher demonstration- examining features of flowers.
Flowers.
KLB BK III.
P 91.CERTIFICATE PG 117
8 2
REPRODUCTION IN PLANTS AND ANIMALS
Pollination. Insect-pollinated flowers.
By the end of the lesson, the learner should be able to:
To define pollination.
To identify agents of pollination.
To describe the structure of insect-pollinated flowers.
Q/A: Definition of pollination.
Agents of pollination.
Class experiment- Structure of insect pollinated flowers.
Students identify various parts.
Insect-pollinated flowers.
KLB BK III.
P 93.CERTIFICATE PG 119
8 3
REPRODUCTION IN PLANTS AND ANIMALS
Pollination. Insect-pollinated flowers.
By the end of the lesson, the learner should be able to:
To define pollination.
To identify agents of pollination.
To describe the structure of insect-pollinated flowers.
Q/A: Definition of pollination.
Agents of pollination.
Class experiment- Structure of insect pollinated flowers.
Students identify various parts.
Insect-pollinated flowers.
KLB BK III.
P 93.CERTIFICATE PG 119
8 4
REPRODUCTION IN PLANTS AND ANIMALS
Wind-pollinated flowers.
Adaptive features of wind-pollinated flowers.
By the end of the lesson, the learner should be able to:
To describe the structure of wind-pollinated flowers.
Class experiment-examine inflorescence of star grass/ maize/ sugarcane.
Identify glumes, spikes and spikelets.
Compare them in text books/ charts.
Wind-pollinated flowers.
KLB BK III.
PP 93-94.CERTIFICATE PG 119
8 5
REPRODUCTION IN PLANTS AND ANIMALS
Features hindering self-pollination.
By the end of the lesson, the learner should be able to:
To discuss features and mechanisms that hinder self-pollination in plants.
Exposition and detailed discussion.
wind & inect pollinated flower
KLB BK III. PP 93-94.
9

Midterm break

10 1
REPRODUCTION IN PLANTS AND ANIMALS
Fertilisation process in flowering plants.
By the end of the lesson, the learner should be able to:
To define fertilisation.

To describe the fertilisation process in flowering plants.

Drawing diagrams,
detailed discussion.
chart
KLB BK III.
P 95.CERTIFICATE PG 121
10 2
REPRODUCTION IN PLANTS AND ANIMALS
Seed formation.
By the end of the lesson, the learner should be able to:

To explain formation of seeds.

Detailed discussion.
text book
KLB BK III.
P 97.CERTIFICATE PG 123
10 3
REPRODUCTION IN PLANTS AND ANIMALS
Fruit development.
By the end of the lesson, the learner should be able to:

To describe development of fruits in flowering plants.

Detailed discussion.

text book
KLB BK III.
P 98.CERTIFICATE PG 124
10 4
REPRODUCTION IN PLANTS AND ANIMALS
Classification of fruits.
By the end of the lesson, the learner should be able to:
To classify fruits using specific criteria.
Teacher presents several types of fruits and leads students in classifying them.
Detailed discussion, drawing of diagrams.

A variety of fruits, petri dishes
Blades
Containers.
KLB BK III.
P 99. CERTIFICATE PG 125
10 5
REPRODUCTION IN PLANTS AND ANIMALS
Placentation.
By the end of the lesson, the learner should be able to:

To define placentation.
To describe the process of placentation.
To identify types of placentation.

Teacher exposes the meaning of placentation.
Students examine ovaries of various fruits as the teacher exposes the types of placentation exhibited.
Students draw diagrams showing types of placentation.
Fruits
Beans
Sunflower
Pawpaw
Orange
Primrose, e.t.c
KLB BK III.
P 100.CERTIFICATE PG 130
11 1
REPRODUCTION IN PLANTS AND ANIMALS
Fruit and seed dispersal.
By the end of the lesson, the learner should be able to:
To explain adaptive features of fruits and seeds to their agents of dispersal.
Students examine fruits and seeds, observe external features, and group them accordingly to methods of dispersal.
Detailed discussion of observations made.


text book
KLB BK III. PP. 102-103 CERTIFICATE PG 130
11 2
REPRODUCTION IN PLANTS AND ANIMALS
Fruit and seed dispersal.
By the end of the lesson, the learner should be able to:
To explain adaptive features of fruits and seeds to their agents of dispersal.
Students examine fruits and seeds, observe external features, and group them accordingly to methods of dispersal.
Detailed discussion of observations made.


text book
KLB BK III. PP. 102-103 CERTIFICATE PG 130
11 3
REPRODUCTION IN PLANTS AND ANIMALS
Internal structure of fruits.
By the end of the lesson, the learner should be able to:
To label the parts of internal structure of a fruit.

To identify the functions of internal parts of a fruit.
Teacher demonstration- Vertical sections of fruits.

Students draw and label the fruit internal structure.


charts
KLB BK III. P. 104 
11 4
REPRODUCTION IN PLANTS AND ANIMALS
Sexual reproduction in animals. External fertilisation.
Internal fertilisation.
By the end of the lesson, the learner should be able to:


To describe external fertilisation in amphibians.


Detailed discussion.
Strands of eggs of frogs.
KLB BK III.
P 105 CERTIFICATE PG 147
11 5
REPRODUCTION IN PLANTS AND ANIMALS
Reproduction in mammals. Reproduction in human beings.
By the end of the lesson, the learner should be able to:
To explain the reproduction process in mammals.


To draw and label the structure of male reproduction system.

Detailed discussion.



Drawing and labeling male reproduction system.


Wall charts-Reproduction system.
KLB BK III. P. 105 CERTIFICATE PG 149
12 1
REPRODUCTION IN PLANTS AND ANIMALS
Functions of parts of male reproduction system.
By the end of the lesson, the learner should be able to:
To explain the male reproduction system.
Detailed discussion.
text book
KLB BK III. PP. 106-108 CERTIFICATE PG 150
12 2
REPRODUCTION IN PLANTS AND ANIMALS
Male reproduction system of a male animal.
By the end of the lesson, the learner should be able to:
To identify parts of male reproduction system of a rabbit/ rat.
To examine reproduction system of a male rabbit /rat.
Identify the parts of the reproduction system.


Reproduction system of a rabbit/ rat.
KLB BK III. P. 108 CERTIFICATE PG 164
12 3
REPRODUCTION IN PLANTS AND ANIMALS
Female reproduction system.
By the end of the lesson, the learner should be able to:
To draw and label parts of the female reproduction system.
Drawing and labeling.
chart
KLB BK III. PP.
108-110. CERTIFICATE PG 164
12 4
REPRODUCTION IN PLANTS AND ANIMALS
Functions of parts of female reproduction system.
Female reproduction system of a female animal.
By the end of the lesson, the learner should be able to:
To explain the functions of parts of female reproduction system.
Detailed discussion.
chart
Dissected female rat/ mouse/rabbit.
KLB BK III. PP.
108-110 CERTIFICATE PG  150
12 5
REPRODUCTION IN PLANTS AND ANIMALS
Formation of ova.
By the end of the lesson, the learner should be able to:
To draw and label the human spermatozoon.
To describe the process of formation of ova.
Drawing and labelling.
Detailed discussion.
Q/A: Adaptations of male gamete to its function.

text book
KLB BK III. PP.
112-113 CERTIFICATE PG 151

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