Living Things and their Environment

Demonstrating osmosis using visking tubing

By the end of the lesson, the learner should be able to:

- Define osmosis
- Demonstrate osmosis using visking tubing
- Connect osmosis to how dried fruits swell when soaked in water

In groups, learners are guided to:
- Tie one end of visking tubing and fill with concentrated sugar solution
- Immerse the tubing in a beaker of distilled water
- Observe changes after thirty minutes
- Explain movement of water molecules through the membrane

How do water molecules move through a semi-permeable membrane?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 118
- Visking tubing
- Concentrated sugar solution
- Distilled water, beaker

- Practical report - Observation - Written explanation

Living Things and their Environment

Demonstrating osmosis using Irish potato
Demonstrating osmosis using banana peel strips
Factors affecting osmosis

By the end of the lesson, the learner should be able to:

- Investigate osmosis using potato cores
- Measure changes in length of potato cores in different solutions
- Relate to why vegetables become crisp in water and soft in salt

- Demonstrate osmosis using banana peel strips
- Explain why strips curve differently in different solutions
- Connect to why pickled vegetables shrink and fresh ones stay firm

In groups, learners are guided to:
- Obtain six potato cores of equal length (50mm)
- Place three cores in distilled water and three in concentrated sugar solution
- Measure length after forty minutes
- Record and compare changes in length
- Prepare thin strips from raw green banana peel
- Place strips in distilled water and concentrated salt solution
- Observe curving direction after thirty minutes
- Explain why inner cells gain or lose water

What happens to plant cells in different solutions?
Why do banana peel strips curve in different directions?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 120
- Irish potatoes, cork borer
- Distilled water
- Concentrated sugar solution
- Ruler, boiling tubes
- Spotlight Integrated Science Learner's Book Grade 8 pg. 121
- Raw green banana peel
- Distilled water
- Concentrated salt solution
- Beakers, scalpel
- Spotlight Integrated Science Learner's Book Grade 8 pg. 123
- Digital devices
- Reference books
- Charts

- Data recording - Measurement accuracy - Written analysis
- Practical observation - Drawing - Written explanation

Living Things and their Environment

Role of osmosis in water absorption and stomata

By the end of the lesson, the learner should be able to:

- Explain the role of osmosis in water absorption by roots
- Describe how osmosis controls opening and closing of stomata
- Connect to why watering plants makes them stand upright

In groups, learners are guided to:
- Discuss how root hair cells absorb water from soil by osmosis
- Explain water distribution from cell to cell in plants
- Describe how guard cells control stomata through osmosis
- Complete table on roles of osmosis

How do plants use osmosis for survival?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 124
- Plant diagrams
- Digital devices
- Reference materials

- Table completion - Oral questions - Written notes

Living Things and their Environment

Role of osmosis in osmoregulation and plant support

By the end of the lesson, the learner should be able to:

- Explain the role of osmosis in osmoregulation in the kidney
- Describe how osmosis provides support in plants
- Relate to why kidneys filter blood and plants droop without water

In groups, learners are guided to:
- Discuss how kidneys use osmosis to filter blood
- Observe plant leaves at different times of day
- Explain wilting and turgidity in plants
- Discuss feeding mechanism of insectivorous plants

How does osmosis help regulate water in living things?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 125
- Young plants
- Digital devices
- Reference books

- Observation records - Written explanation - Oral questions

Living Things and their Environment

Importance of diffusion and osmosis
Introduction to the menstrual cycle

By the end of the lesson, the learner should be able to:

- Explain the importance of diffusion and osmosis in living things
- Summarise how these processes support life
- Connect to everyday processes like breathing, eating, and plant growth

In groups, learners are guided to:
- Watch videos on gaseous exchange in human lungs
- Discuss importance of diffusion in breathing and nutrition
- Discuss importance of osmosis in water balance
- Complete assessment activity on the sub-strand

Why are diffusion and osmosis important for life?

- Spotlight Integrated Science Learner's Book Grade 8 pg. 126
- Digital devices
- Assessment worksheets
- Reference materials
- Spotlight Integrated Science Learner's Book Grade 8
- Reference books
- Charts on menstrual cycle

- Self-assessment - Written test - Oral presentation

Living Things and their Environment

Phases of the menstrual cycle
Ovulation and luteal phase
Irregular periods and bleeding
Menstrual pain and discomfort
Managing menstrual cycle challenges

By the end of the lesson, the learner should be able to:

- Describe the phases of the menstrual cycle
- Explain what happens during menstruation phase
- Understand that cycle phases are natural body rhythms like sleep patterns

- Identify challenges related to the menstrual cycle
- Describe irregular periods and irregular bleeding
- Recognise when to seek medical advice for menstrual problems

In groups, learners are guided to:
- Study diagrams showing phases of the menstrual cycle
- Discuss the menstruation phase (days 1-5)
- Explain the follicular phase and its characteristics
- Record notes on each phase
- Search for information on challenges related to menstrual cycle
- Discuss causes of irregular periods
- Explain what irregular bleeding means
- Discuss when these conditions require medical attention

What are the different phases of the menstrual cycle?
What challenges may occur during the menstrual cycle?

- Spotlight Integrated Science Learner's Book Grade 8
- Menstrual cycle diagrams
- Digital devices
- Charts
- Ovulation charts
- Reference materials
- Spotlight Integrated Science Learner's Book Grade 8
- Digital devices
- Reference books
- Health education materials
- Health education charts
- Reference materials
- Health education materials
- Planning worksheets

- Diagram labelling - Written notes - Oral questions
- Oral questions - Written notes - Group discussion

Living Things and their Environment

Menstrual hygiene management
The male reproductive cells

By the end of the lesson, the learner should be able to:

- Explain the importance of menstrual hygiene
- Describe proper use of sanitary products
- Practice good hygiene for health and confidence

In groups, learners are guided to:
- Discuss importance of menstrual hygiene
- Explain proper use and disposal of sanitary pads
- Discuss alternative menstrual products
- Emphasise regular changing and cleanliness

Why is menstrual hygiene important?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Sanitary products samples
- Digital devices
- Sperm cell diagrams
- Digital devices
- Reference books

- Oral questions - Written notes - Demonstration

Living Things and their Environment

The female reproductive cell
The process of fertilisation

By the end of the lesson, the learner should be able to:

- Describe the structure of an egg cell (ovum)
- Explain the function of the egg in reproduction
- Recognise that the egg provides nutrients for early embryo development

In groups, learners are guided to:
- Study diagrams of egg cells
- Identify parts: cell membrane, cytoplasm, nucleus
- Compare size of egg to sperm
- Discuss how the egg is released during ovulation

What is the structure and function of the egg cell?

- Spotlight Integrated Science Learner's Book Grade 8
- Egg cell diagrams
- Digital devices
- Reference materials
- Fertilisation diagrams
- Charts

- Diagram labelling - Written notes - Oral questions

Living Things and their Environment

Cell division after fertilisation

By the end of the lesson, the learner should be able to:

- Describe what happens after fertilisation
- Explain how the zygote divides to form a blastocyst
- Connect cell division to how a single cell becomes a complete human

In groups, learners are guided to:
- Study diagrams showing cell division after fertilisation
- Explain how zygote divides into 2, 4, 8 cells and more
- Describe formation of blastocyst
- Discuss journey of blastocyst to the uterus

What happens to the zygote after fertilisation?

- Spotlight Integrated Science Learner's Book Grade 8
- Cell division diagrams
- Digital devices
- Reference books

- Diagram sequencing - Oral questions - Written notes

Living Things and their Environment

Implantation
Introduction to STIs

By the end of the lesson, the learner should be able to:

- Describe the process of implantation
- Explain how the blastocyst attaches to the uterus wall
- Understand that successful implantation marks the beginning of pregnancy

- Define sexually transmitted infections (STIs)
- List common STIs
- Recognise that STIs are preventable health conditions

In groups, learners are guided to:
- Study illustrations showing implantation
- Explain how blastocyst embeds in uterine wall
- Discuss importance of the thickened uterine lining
- Describe what happens if implantation does not occur
- Search for information on STIs from print and non-print materials
- Define STIs and explain how they spread
- List common STIs: HIV/AIDS, gonorrhea, syphilis, herpes
- Discuss importance of STI awareness

How does the blastocyst implant in the uterus?
What are sexually transmitted infections?

- Spotlight Integrated Science Learner's Book Grade 8
- Implantation diagrams
- Digital devices
- Charts
- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Reference books

- Diagram labelling - Written explanation - Oral questions
- Oral questions - Written notes - Group discussion

Living Things and their Environment

Symptoms of HIV/AIDS

By the end of the lesson, the learner should be able to:

- Outline symptoms of HIV/AIDS
- Explain the difference between HIV and AIDS
- Know that early testing and treatment help people with HIV live healthy lives

In groups, learners are guided to:
- Search for information on HIV/AIDS symptoms
- Discuss initial symptoms: fever, fatigue, swollen lymph nodes
- Explain progression to AIDS if untreated
- Discuss importance of testing and treatment

What are the symptoms of HIV/AIDS?

- Spotlight Integrated Science Learner's Book Grade 8
- HIV/AIDS education materials
- Digital devices
- Charts

- Written notes - Oral questions - Class discussion

Living Things and their Environment

Symptoms of gonorrhea, syphilis, and herpes
Prevention of STIs - Abstinence and faithfulness

By the end of the lesson, the learner should be able to:

- Describe symptoms of gonorrhea, syphilis, and herpes
- Explain that symptoms may vary between males and females
- Understand that seeking treatment early prevents complications

In groups, learners are guided to:
- Discuss symptoms of gonorrhea in males and females
- Explain symptoms of syphilis at different stages
- Describe symptoms of genital herpes
- Emphasise importance of seeking medical attention

What are the symptoms of common bacterial and viral STIs?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Reference books
- Prevention posters

- Written summary - Oral questions - Group presentation

Living Things and their Environment

Prevention of STIs - Other measures

By the end of the lesson, the learner should be able to:

- Describe additional STI prevention measures
- Explain the importance of regular health check-ups
- Take responsibility for personal health decisions

In groups, learners are guided to:
- Discuss proper use of protection during intercourse
- Explain importance of regular STI testing
- Discuss avoiding sharing needles and sharp objects
- Emphasise seeking immediate treatment if infected

What other measures help prevent STIs?

- Spotlight Integrated Science Learner's Book Grade 8
- Health education materials
- Digital devices
- Reference books

- Written notes - Oral questions - Group discussion

Force and Energy

Forms of energy in nature
Forms of energy - Chemical and electrical energy
Forms of energy - Mechanical energy
Forms of energy - Heat, light and sound energy
Energy transformation - Introduction

By the end of the lesson, the learner should be able to:

- Define energy and state its SI unit
- Identify different forms of energy in nature
- Relate energy forms to everyday activities like cooking and lighting

- Distinguish between potential and kinetic energy
- Demonstrate mechanical energy using simple objects
- Relate potential and kinetic energy to playground activities and sports

In groups, learners are guided to:
- Discuss the meaning of energy and its SI unit
- Use textbooks and Internet to search for information on forms of energy
- Identify forms of energy found in the environment
- Discuss potential energy and kinetic energy
- Demonstrate potential energy using a raised object
- Demonstrate kinetic energy using a moving object

What are the different forms of energy around us?
What determines whether an object has potential or kinetic energy?

- Spotlight Integrated Science pg. 130
- Digital resources
- Internet access
- Batteries
- Electrical appliances
- Spotlight Integrated Science pg. 131
- Small stones
- Balls
- Working surface
- Spotlight Integrated Science pg. 132
- Candles
- Torches
- Musical instruments
- Digital resources
- Charts

- Oral questions - Observation - Written assignments
- Practical assessment - Oral questions - Observation

Force and Energy

Energy transformation - Potential to kinetic energy
Energy transformation - Chemical to heat and light energy

By the end of the lesson, the learner should be able to:

- Demonstrate transformation of potential energy to kinetic energy
- Explain energy transformation using a falling object
- Relate this transformation to activities like dropping objects and swinging

In groups, learners are guided to:
- Place a small stone at the edge of a table and push it gently
- Observe and record the energy transformation
- Discuss the energy changes that occur

What happens to the energy of an object when it falls?

- Spotlight Integrated Science pg. 133
- Small stones
- Working table
- Stopwatch
- Candles
- Matchsticks
- Working surface

- Practical assessment - Observation - Oral questions

Force and Energy

Energy transformation - Electrical to heat energy
Energy transformation - Kinetic to sound energy

By the end of the lesson, the learner should be able to:

- Demonstrate transformation of electrical energy to heat energy
- Explain how electric heaters work
- Relate this transformation to household appliances like kettles and irons

In groups, learners are guided to:
- Set up an electric water heater and observe the energy transformation
- Discuss how electrical energy is converted to heat
- Identify appliances that transform electrical energy to heat

How do electric heaters warm our homes?

- Spotlight Integrated Science pg. 134
- Electric water heater
- Beaker
- Water
- Musical instruments
- Digital resources

- Practical assessment - Observation - Oral questions

Force and Energy

Energy transformation - Chemical to electrical to light energy

By the end of the lesson, the learner should be able to:

- Set up a simple electric circuit
- Demonstrate transformation of chemical energy to electrical to light energy
- Relate this transformation to how torches and phones work

In groups, learners are guided to:
- Set up a simple circuit with cells, switch, wires and bulb
- Close the switch and observe the bulb
- Discuss the energy transformation process

How do batteries power our devices?

- Spotlight Integrated Science pg. 134
- Cells
- Switch
- Wires
- Bulb

- Practical assessment - Observation - Written questions

Force and Energy

Energy transformation - Using a pendulum
Energy transformation in appliances - Gas cylinder and electric cooker
Energy transformation in appliances - Generators and dynamos

By the end of the lesson, the learner should be able to:

- Demonstrate energy transformation using a pendulum
- Explain the continuous transformation between potential and kinetic energy
- Connect pendulum motion to playground swings and clock mechanisms

- Explain energy transformation in gas cylinders and electric cookers
- Compare energy transformations in different cooking appliances
- Connect these transformations to kitchen activities at home

In groups, learners are guided to:
- Set up a simple pendulum
- Observe and discuss energy transformation at different points
- Record the energy changes at points A, B and C
- Study pictures of gas cylinder and electric cooker
- Discuss the energy transformations that occur when in use
- Compare the energy changes in both appliances

How does a pendulum demonstrate continuous energy transformation?
How do different cooking appliances transform energy?

- Spotlight Integrated Science pg. 135
- String
- Bob
- Retort stand
- Spotlight Integrated Science pg. 138
- Charts showing appliances
- Digital resources
- Bicycle with dynamo
- Charts

- Practical assessment - Observation - Oral questions
- Oral questions - Written assignments - Observation

Force and Energy

Energy transformation in appliances - Solar panels and microphones

By the end of the lesson, the learner should be able to:

- Explain energy transformation in solar panels
- Describe how microphones work
- Connect solar energy to sustainable power solutions at home

In groups, learners are guided to:
- Study pictures of solar panels and microphones
- Discuss the energy transformations in each device
- Search the Internet for more applications

How do solar panels help us harness the sun's energy?

- Spotlight Integrated Science pg. 138
- Charts
- Digital resources
- Internet access

- Oral questions - Written assignments - Observation

Force and Energy

Energy transformation in appliances - Electric heaters and LEDs

By the end of the lesson, the learner should be able to:

- Explain energy transformation in electric heaters
- Describe how light emitting diodes (LEDs) work
- Relate LEDs to energy-efficient lighting in homes and streets

In groups, learners are guided to:
- Study pictures of electric heaters and LED torches
- Discuss the energy transformations in each device
- Compare energy efficiency of different devices

Why are LED bulbs preferred for lighting?

- Spotlight Integrated Science pg. 140
- LED torch
- Electric heater
- Charts

- Oral questions - Observation - Written questions

Force and Energy

Safety measures - Road accidents and seat belts

By the end of the lesson, the learner should be able to:

- Explain dangers of energy transformation related to road accidents
- Describe how seat belts protect passengers
- Connect safety measures to daily travel in vehicles

In groups, learners are guided to:
- Discuss dangers associated with kinetic energy in moving vehicles
- Explain how seat belts and speed governors prevent injuries
- Discuss road safety measures

How do seat belts protect us during accidents?

- Spotlight Integrated Science pg. 141
- Charts on road safety
- Digital resources

- Oral questions - Written assignments - Observation

Force and Energy

Safety measures - Bright light and loud sounds
Safety measures - Fire and electrical accidents
Applications of energy transformation - Daily life examples

By the end of the lesson, the learner should be able to:

- Explain dangers of bright light to the eyes
- Describe how to protect against loud sounds
- Relate eye and ear protection to workplace safety and concerts

- Explain dangers of fire caused by energy transformation
- Describe safety measures when using electrical appliances
- Connect fire safety to kitchen and workshop practices

In groups, learners are guided to:
- Discuss health hazards from bright light such as solar eclipse
- Explain protection measures like sunglasses and earmuffs
- Discuss situations requiring eye and ear protection
- Discuss accidents caused by fire and electricity
- Explain prevention and mitigation strategies
- Practice safety measures when lighting a gas cooker

How can we protect our eyes and ears from harmful energy?
What precautions should we take when using fire and electricity?

- Spotlight Integrated Science pg. 142
- Sunglasses
- Earmuffs
- Charts
- Spotlight Integrated Science pg. 143
- Charts on fire safety
- Digital resources
- Spotlight Integrated Science pg. 144
- Charts

- Oral questions - Observation - Written questions
- Oral questions - Written assignments - Observation

Force and Energy

Applications of energy transformation - Poster making

By the end of the lesson, the learner should be able to:

- Create posters appreciating energy transformation
- Present applications of energy transformation to classmates
- Relate energy transformation to career opportunities in engineering and technology

In groups, learners are guided to:
- Make posters appreciating energy transformation
- Present findings to classmates
- Discuss career opportunities related to energy

How can we share knowledge about energy transformation with others?

- Spotlight Integrated Science pg. 145
- Manila papers
- Markers
- Charts

- Project assessment - Peer assessment - Oral presentations

Force and Energy

Meaning of pressure - Introduction
Meaning of pressure - Formula and SI unit

By the end of the lesson, the learner should be able to:

- Define pressure as used in science
- Explain the relationship between force, area and pressure
- Connect pressure concepts to wearing different types of shoes

In groups, learners are guided to:
- Read and discuss the conversation between Mwololo and Njue
- Discuss why sharp-heeled shoes sink into sand
- Use textbooks and the Internet to find the meaning of pressure

What is pressure and how does it affect objects?

- Spotlight Integrated Science pg. 147
- Different types of shoes
- Sandy surface
- Spotlight Integrated Science pg. 149
- Charts
- Calculators

- Oral questions - Observation - Written questions