Living Things and their Environment

The Cell - Cell structure as seen under a light microscope

By the end of the lesson, the learner should be able to:
- Define the term cell
- Identify structures of plant and animal cells
- Show interest in studying cells

In groups, learners are guided to:
- Discuss the meaning of cells
- Download diagrams of plant and animal cells from the Internet
- Identify parts of plant and animal cells
- List similarities and differences between plant and animal cells

What makes up plant and animal cells?

- Mentor Integrated Science pg. 49
- Digital devices
- Internet access
- Charts showing cell structures

- Observation - Oral questions - Written assignments

Living Things and their Environment

The Cell - Cell structure as seen under a light microscope
The Cell - Safety when handling a microscope

By the end of the lesson, the learner should be able to:
- Describe the structure of plant cells
- Identify parts of a plant cell
- Appreciate the importance of microscopes

In groups, learners are guided to:
- Study diagrams of plant cells
- Identify cell wall, cell membrane, cytoplasm, nucleus, vacuole and chloroplast
- Draw and label plant cell structures

How do we observe cells?

- Mentor Integrated Science pg. 49
- Diagrams of plant cells
- Drawing materials
- Mentor Integrated Science pg. 50
- Light microscope
- Soft tissue paper
- Ethanol

- Drawings - Oral questions - Observation

Living Things and their Environment

The Cell - Preparation of temporary slides of plant cells
The Cell - Observing plant cells under a light microscope
The Cell - Functions of parts of a plant cell

By the end of the lesson, the learner should be able to:
- Prepare temporary slides of plant cells
- Mount specimens correctly
- Demonstrate safety when handling microscope materials

In groups, learners are guided to:
- Collect plant materials
- Prepare thin sections
- Mount specimens on slides
- Add water and cover slip

How do we prepare specimens for observation?

- Mentor Integrated Science pg. 52
- Glass slides
- Cover slips
- Plant materials
- Water
- Scalpel
- Light microscope
- Prepared slides
- Drawing materials
- Digital devices
- Reference books
- Internet access

- Practical assessment - Observation - Oral questions

Living Things and their Environment

The Cell - Functions of nucleus, vacuole and chloroplast
The Cell - Observing animal cells under a light microscope
The Cell - Differentiating between plant and animal cells

By the end of the lesson, the learner should be able to:
- Explain the function of the nucleus
- Describe the role of vacuoles and chloroplasts
- Show interest in cell biology

In groups, learners are guided to:
- Discuss the function of nucleus in controlling cell activities
- Explain storage function of vacuoles
- Describe role of chloroplasts in photosynthesis

What is the importance of nucleus, vacuole and chloroplast?

- Mentor Integrated Science pg. 53
- Charts
- Digital devices
- Reference books
- Mentor Integrated Science pg. 54
- Light microscope
- Permanent slides of animal cells
- Drawing materials
- Mentor Integrated Science pg. 55
- Diagrams
- Textbooks

- Oral questions - Written tests - Observation

Living Things and their Environment

The Cell - Characteristics of plant and animal cells

By the end of the lesson, the learner should be able to:
- Describe characteristics of plant cells
- Describe characteristics of animal cells
- Show interest in cellular biology

In groups, learners are guided to:
- Discuss shape and structure of plant cells
- Examine irregular shape of animal cells
- Compare nucleus location in both cells
- Discuss presence of chloroplasts

Why do plant and animal cells have different characteristics?

- Mentor Integrated Science pg. 55
- Charts
- Diagrams
- Digital resources

- Oral presentations - Written tests - Observation

Living Things and their Environment

The Cell - Extended activity: Making cell models

By the end of the lesson, the learner should be able to:
- Create models of plant and animal cells
- Label cell parts correctly
- Demonstrate creativity in model making

In groups, learners are guided to:
- Use locally available materials (cartons, plasticine, clay)
- Make models of plant and animal cells
- Label parts correctly
- Display and peer-assess work

How can we represent cells using models?

- Mentor Integrated Science pg. 56
- Cartons
- Plasticine
- Clay
- Manila papers
- Glue

- Practical assessment - Peer assessment - Observation

Living Things and their Environment

The Cell - Role of cells in living organisms
The Cell - Magnification of cells: Understanding magnification

By the end of the lesson, the learner should be able to:
- Explain why cells are basic units of life
- Describe importance of cells in organisms
- Appreciate the role of cells

In groups, learners are guided to:
- Discuss why cells are defined as basic units of life
- Explain importance of cells to living organisms
- Discuss cell specialization
- Share findings with classmates

Why is the cell defined as the basic unit of life?

- Mentor Integrated Science pg. 57
- Digital devices
- Reference books
- Charts
- Microscope
- Reference materials

- Oral presentations - Written assignments - Observation

Living Things and their Environment

The Cell - Calculating magnification

By the end of the lesson, the learner should be able to:
- Calculate total magnification of a microscope
- Apply the magnification formula
- Appreciate mathematical applications in science

In groups, learners are guided to:
- Learn magnification formula
- Calculate total magnification using eye-piece and objective lens
- Solve example problems
- Practice calculations

How do we calculate magnification?

- Mentor Integrated Science pg. 58
- Calculator
- Worksheets
- Microscope specifications

- Written tests - Calculations - Oral questions

Living Things and their Environment

The Cell - Microscope lenses and their magnifications

By the end of the lesson, the learner should be able to:
- Identify different objective lenses
- State magnification ranges of lenses
- Appreciate diversity in microscope lenses

In groups, learners are guided to:
- Identify eye-piece lens magnifications (x5 to x30)
- Learn about low power objective (x4)
- Study medium power objective (x10 or x20)
- Examine high power objective (x40)

What are the different types of microscope lenses?

- Mentor Integrated Science pg. 58
- Microscope
- Charts
- Reference books

- Observation - Oral questions - Written assignments

Living Things and their Environment

The Cell - Assessment: Drawing and magnification
The Cell - Assessment and feedback

By the end of the lesson, the learner should be able to:
- Draw a plant cell with labels
- Calculate magnification problems
- Explain microscope care

In groups, learners are guided to:
- Draw and label a plant cell
- Adjust microscope for clear viewing
- Calculate magnification from given values
- Explain purposes of thin specimens and staining

How well do you understand cells and microscopy?

- Mentor Integrated Science pg. 59
- Drawing materials
- Calculator
- Assessment sheets
- Mentor Integrated Science pg. 49-59
- Assessment papers
- Marking guides

- Written tests - Drawings - Calculations

Living Things and their Environment

Movement of Materials In and Out of the Cell - Introduction to cell transport

By the end of the lesson, the learner should be able to:
- Identify substances that move into cells
- Identify substances that move out of cells
- Appreciate the importance of cell transport

In groups, learners are guided to:
- Study chart showing substances entering and leaving cells
- Discuss substances moving into cells (oxygen, water, nutrients)
- Discuss substances moving out (carbon dioxide, waste products)
- Explain importance of cell membrane

What substances move in and out of cells?

- Mentor Integrated Science pg. 60
- Charts
- Diagrams
- Digital resources

- Observation - Oral questions - Written assignments

Living Things and their Environment

Movement of Materials In and Out of the Cell - Processes of material movement

By the end of the lesson, the learner should be able to:
- Identify diffusion as a transport process
- Identify osmosis as a transport process
- Show interest in cell transport mechanisms

In groups, learners are guided to:
- Search for information on movement processes
- Discuss diffusion and osmosis
- Identify substances transported by each method
- Share findings with classmates

How do materials move across cell membranes?

- Mentor Integrated Science pg. 61
- Digital devices
- Reference books
- Internet access

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Introduction to diffusion
Movement of Materials In and Out of the Cell - Demonstrating diffusion in gases

By the end of the lesson, the learner should be able to:
- Define diffusion
- Explain the concept of diffusion
- Appreciate diffusion in daily life

In groups, learners are guided to:
- Discuss how food aromas spread
- Explain movement of aroma particles
- Define diffusion as movement from high to low concentration
- Relate diffusion to everyday experiences

What is diffusion and how does it occur?

- Mentor Integrated Science pg. 61
- Examples from daily life
- Charts
- Digital resources
- Mentor Integrated Science pg. 62
- Perfume or scented substance
- Enclosed room
- Timer

- Oral questions - Written assignments - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Explaining diffusion observations

By the end of the lesson, the learner should be able to:
- Explain observations from diffusion experiment
- Describe particle movement during diffusion
- Draw conclusions about diffusion

In groups, learners are guided to:
- Discuss observations from perfume experiment
- Explain how particles moved from high to low concentration
- Relate time to distance in diffusion
- Write conclusion on diffusion process

Why did different learners detect the perfume at different times?

- Mentor Integrated Science pg. 62
- Observation records
- Notebooks
- Reference materials

- Written assignments - Oral explanations - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Demonstrating diffusion in plant materials

By the end of the lesson, the learner should be able to:
- Demonstrate diffusion using plant materials
- Observe ink movement in plants
- Show responsibility in handling materials safely

In groups, learners are guided to:
- Put water in container
- Add ink and stir
- Place young plant with roots in colored water
- Leave for two hours
- Cut stem and observe
- Dispose materials appropriately

How do plants absorb colored water?

- Mentor Integrated Science pg. 63
- Young plant
- Ink
- Water
- Container
- Scalpel
- Gloves

- Practical assessment - Observation - Oral questions

Living Things and their Environment

Movement of Materials In and Out of the Cell - Explaining diffusion in plant cells
Movement of Materials In and Out of the Cell - Role of diffusion in animals

By the end of the lesson, the learner should be able to:
- Explain ink movement in plant cells
- Describe cell-to-cell diffusion
- Appreciate diffusion in plants

In groups, learners are guided to:
- Discuss observations from plant experiment
- Explain movement of ink from high to low concentration
- Describe cell-to-cell diffusion process
- Draw conclusions on diffusion in plants

How did ink reach all parts of the plant?

- Mentor Integrated Science pg. 64
- Observation records
- Diagrams
- Notebooks
- Mentor Integrated Science pg. 65
- Digital devices
- Charts
- Reference books
- Video resources

- Written assignments - Oral explanations - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Role of diffusion in plants

By the end of the lesson, the learner should be able to:
- Explain mineral salt absorption by roots
- Describe gaseous exchange in plants
- Show interest in plant processes

In groups, learners are guided to:
- Discuss absorption of mineral salts from soil
- Explain carbon dioxide diffusion during photosynthesis
- Describe oxygen diffusion during respiration
- Discuss transport of manufactured food

How does diffusion help plants survive?

- Mentor Integrated Science pg. 65
- Diagrams
- Charts
- Reference books

- Oral questions - Written tests - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Introduction to osmosis

By the end of the lesson, the learner should be able to:
- Define osmosis
- Explain semi-permeable membranes
- Show interest in osmosis

In groups, learners are guided to:
- Discuss meaning of pressure in science
- Define semi-permeable membrane
- Explain osmosis as water movement through membrane
- Relate to cell membrane function

What is osmosis and how is it different from diffusion?

- Mentor Integrated Science pg. 67
- Diagrams
- Charts
- Reference materials

- Oral questions - Written assignments - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Demonstrating osmosis using visking tubing
Movement of Materials In and Out of the Cell - Explaining osmosis observations

By the end of the lesson, the learner should be able to:
- Set up osmosis experiment
- Use visking tubing correctly
- Demonstrate safety when handling materials

In groups, learners are guided to:
- Cut and open visking tubing
- Fill with concentrated sugar solution
- Tie both ends tightly
- Immerse in distilled water
- Suspend using string and glass rod
- Leave undisturbed for 30 minutes

How can we demonstrate osmosis in the laboratory?

- Mentor Integrated Science pg. 68
- Visking tubing
- Sugar solution
- Distilled water
- Beakers
- String
- Glass rod
- Mentor Integrated Science pg. 69
- Observation records
- Diagrams
- Notebooks

- Practical assessment - Observation - Oral questions

Living Things and their Environment

Movement of Materials In and Out of the Cell - Demonstrating osmosis using plant materials

By the end of the lesson, the learner should be able to:
- Demonstrate osmosis using potato chips
- Set up experiment correctly
- Show responsibility in handling materials

In groups, learners are guided to:
- Peel and cut potato into chips
- Measure initial length of chips
- Place one chip in distilled water
- Place another in sugar solution
- Leave for 30 minutes
- Measure final lengths and record

How does osmosis occur in plant cells?

- Mentor Integrated Science pg. 71
- Potato
- Distilled water
- Sugar solution
- Beakers
- Ruler
- Scalpel

- Practical assessment - Observation - Written records

Living Things and their Environment

Movement of Materials In and Out of the Cell - Explaining osmosis in plant cells

By the end of the lesson, the learner should be able to:
- Explain turgidity in plant cells
- Explain flaccidity in plant cells
- Appreciate osmosis in plants

In groups, learners are guided to:
- Discuss observations on potato chips
- Explain why chip in water became firm and turgid
- Explain why chip in sugar solution became soft
- Describe water movement by osmosis
- Draw conclusions

Why did the potato chips change differently?

- Mentor Integrated Science pg. 72
- Observation records
- Diagrams
- Notebooks

- Written assignments - Oral explanations - Observation

Living Things and their Environment

Movement of Materials In and Out of the Cell - Role of osmosis in plants
Movement of Materials In and Out of the Cell - Role of osmosis in animals

By the end of the lesson, the learner should be able to:
- Explain water uptake by roots
- Describe stomata opening and closing
- Show interest in plant processes

In groups, learners are guided to:
- Search for information on osmosis in plants
- Discuss water uptake by root hairs
- Explain opening and closing of stomata
- Describe feeding in insectivorous plants
- Discuss support in herbaceous plants

How does osmosis help plants function?

- Mentor Integrated Science pg. 73
- Digital devices
- Charts
- Reference books
- Diagrams
- Mentor Integrated Science pg. 74

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Introduction to human reproduction

By the end of the lesson, the learner should be able to:
- Recall parts of female reproductive system
- Explain importance of reproduction
- Show interest in reproduction studies

In groups, learners are guided to:
- Review physical changes in adolescent girls
- Name parts of female reproductive system
- Identify part that releases eggs
- Discuss egg release frequency
- Define reproduction

Why is reproduction important?

- Mentor Integrated Science pg. 73
- Charts
- Diagrams
- Reference books

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Understanding menstruation

By the end of the lesson, the learner should be able to:
- Define menstruation
- Explain why menstruation is monthly
- Show respect for those experiencing menstruation

In groups, learners are guided to:
- Discuss meaning of menstruation
- Explain monthly cycle
- Describe body changes during menstruation
- Share findings respectfully

What is menstruation?

- Mentor Integrated Science pg. 73
- Charts
- Reference materials
- Digital resources

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Stages of the menstrual cycle
Reproduction in Human Beings - Luteal and menstrual phases

By the end of the lesson, the learner should be able to:
- Identify follicular phase
- Identify ovulation phase
- Show interest in understanding menstrual cycle

In groups, learners are guided to:
- Search for information on menstrual cycle stages
- Study follicular phase
- Learn about ovulation phase
- Write summary notes

What are the stages of the menstrual cycle?

- Mentor Integrated Science pg. 74
- Digital devices
- Reference books
- Charts
- Internet access
- Diagrams

- Written assignments - Oral presentations - Observation

Living Things and their Environment

Reproduction in Human Beings - Reading about menstrual challenges

By the end of the lesson, the learner should be able to:
- Identify challenges related to menstruation
- Show empathy for those experiencing challenges
- Appreciate the need for support

In groups, learners are guided to:
- Read story about Monicah and Mrs Safi
- Identify challenges Monicah faced
- Discuss painful cramps
- Understand embarrassment issues
- Recognize lack of sanitary towels problem

What challenges do people face during menstruation?

- Mentor Integrated Science pg. 75
- Story text
- Discussion materials

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Health challenges related to menstruation

By the end of the lesson, the learner should be able to:
- Explain pre-menstrual syndrome
- Describe menstrual pain
- Show awareness of when to seek medical attention

In groups, learners are guided to:
- Discuss pre-menstrual syndrome symptoms
- Explain menstrual pain and cramps
- Identify severe conditions
- Understand when to seek medical help

What health challenges are related to menstruation?

- Mentor Integrated Science pg. 76
- Reference materials
- Charts
- Digital resources

- Oral questions - Written tests - Observation

Living Things and their Environment

Reproduction in Human Beings - Irregular periods and heavy bleeding
Reproduction in Human Beings - Emotional and social challenges

By the end of the lesson, the learner should be able to:
- Explain irregular periods
- Describe heavy bleeding
- Appreciate importance of seeking medical attention

In groups, learners are guided to:
- Define irregular periods (shorter or longer cycles)
- Discuss normal cycle length (21-35 days)
- Explain heavy bleeding symptoms
- Emphasize need for medical attention

When should someone seek medical help for menstrual problems?

- Mentor Integrated Science pg. 77
- Charts
- Reference books
- Digital resources
- Reference materials
- Discussion guides

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Managing menstrual challenges

By the end of the lesson, the learner should be able to:
- Suggest ways to manage health challenges
- Propose solutions for emotional challenges
- Develop empathy and support strategies

In groups, learners are guided to:
- Discuss measures to cope with challenges
- Suggest when to seek medical attention
- Propose ways to control mood swings
- Discuss making reusable sanitary towels
- Promote community support

How can we manage menstrual challenges?

- Mentor Integrated Science pg. 78
- Discussion materials
- Reference books

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Process of fertilisation

By the end of the lesson, the learner should be able to:
- Describe fertilisation process
- Explain fusion of sperm and ovum
- Appreciate the beginning of life

In groups, learners are guided to:
- Study chart showing fertilisation
- Discuss movement of ovum in fallopian tube
- Explain fusion of sperm with ovum
- Define zygote
- Discuss cell division

Where does fertilisation occur?

- Mentor Integrated Science pg. 79
- Charts
- Diagrams
- Reference books

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Process of implantation
Reproduction in Human Beings - Development from embryo to foetus

By the end of the lesson, the learner should be able to:
- Describe implantation process
- Explain formation of blastocyst
- Show interest in human development

In groups, learners are guided to:
- Discuss movement of zygote to uterus
- Explain cell divisions forming ball of cells
- Define blastocyst
- Describe attachment to uterus lining
- Explain embryo formation

What happens after fertilisation?

- Mentor Integrated Science pg. 79
- Charts
- Diagrams
- Reference books
- Mentor Integrated Science pg. 80

- Oral questions - Written tests - Observation

Living Things and their Environment

Reproduction in Human Beings - Introduction to Sexually Transmitted Infections

By the end of the lesson, the learner should be able to:
- Define STIs
- List common STIs
- Appreciate the need for STI prevention

In groups, learners are guided to:
- Discuss how sexual intercourse can lead to STIs
- List STIs (syphilis, gonorrhoea, herpes, HIV/AIDS)
- Explain health complications if untreated
- Emphasize importance of prevention

What are Sexually Transmitted Infections?

- Mentor Integrated Science pg. 80
- Charts
- Reference materials
- Digital resources

- Oral questions - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Syphilis: Symptoms and prevention

By the end of the lesson, the learner should be able to:
- Describe syphilis
- List symptoms of syphilis
- Explain prevention methods

In groups, learners are guided to:
- Search for information on syphilis
- Discuss symptoms at different stages
- Explain primary stage (painless sore)
- Describe secondary stage (rash, fever)
- Discuss prevention methods (abstinence, faithfulness, testing)

How can syphilis be prevented?

- Mentor Integrated Science pg. 81
- Digital devices
- Reference books
- Charts

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Gonorrhoea: Symptoms and prevention
Reproduction in Human Beings - Herpes: Symptoms and prevention

By the end of the lesson, the learner should be able to:
- Describe gonorrhoea
- List symptoms in males and females
- Explain prevention methods

In groups, learners are guided to:
- Search for information on gonorrhoea
- Discuss symptoms in men (painful urination, discharge)
- Discuss symptoms in women (increased discharge, pelvic pain)
- Explain prevention methods

How can gonorrhoea be prevented?

- Mentor Integrated Science pg. 82
- Digital devices
- Reference books
- Charts
- Mentor Integrated Science pg. 83

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - HIV and AIDS: Symptoms and prevention

By the end of the lesson, the learner should be able to:
- Explain HIV and AIDS
- Describe symptoms
- Explain comprehensive prevention methods

In groups, learners are guided to:
- Search for information on HIV and AIDS
- Discuss HIV symptoms (flu-like)
- Explain AIDS symptoms (opportunistic infections)
- Discuss prevention (abstinence, faithfulness, testing, safe practices)
- Explain importance of treatment

How can HIV and AIDS be prevented?

- Mentor Integrated Science pg. 84
- Digital devices
- Reference books
- Charts

- Oral presentations - Written assignments - Observation

Living Things and their Environment

Reproduction in Human Beings - Need for a healthy reproductive system

By the end of the lesson, the learner should be able to:
- Explain importance of healthy reproductive system
- Describe ways to maintain reproductive health
- Show commitment to reproductive health

In groups, learners are guided to:
- Discuss meaning of healthy reproductive system
- Explain importance for reproduction and well-being
- Study Juliet's notes on maintaining health
- Write personal commitment to reproductive health

Why is a healthy reproductive system important?

- Mentor Integrated Science pg. 85
- Reference materials
- Discussion guides
- Notebooks

- Written assignments - Oral presentations - Observation