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| WK | LSN | TOPIC | SUB-TOPIC | OBJECTIVES | T/L ACTIVITIES | T/L AIDS | REFERENCE | REMARKS |
|---|---|---|---|---|---|---|---|---|
| 2 | 1 |
RADIOACTIVITY
|
Introduction, Nuclear Stability and Types of Radioactivity
|
By the end of the
lesson, the learner
should be able to:
Define nuclide, isotope, and radioisotope - Compare nuclear vs chemical reactions - Explain neutron/proton ratios - Distinguish natural from artificial radioactivity |
Q/A: Review atomic structure from Form 2
- Study Table 7.1 - nuclear vs chemical reactions - Analysis of neutron/proton ratios and nuclear stability - Discussion on natural vs artificial radioactivity |
Periodic table, atomic structure charts, Table 7.1, nuclear stability diagrams
|
KLB Secondary Chemistry Form 4, Pages 199-201
|
|
| 2 | 2 |
RADIOACTIVITY
|
Types of Radiation and Their Properties
Radioactive Decay and Half-Life Concept |
By the end of the
lesson, the learner
should be able to:
Identify alpha, beta, and gamma radiations - Compare penetrating abilities and ionizing power - Explain electric field deflection - Analyze safety implications |
Study alpha (α), beta (β), gamma (γ) characteristics
- Figure 7.2 - penetrating power demonstration - Figure 7.3 - electric field effects - Discussion on radiation protection and detection |
Radiation type charts, penetration diagrams, electric field illustrations, safety equipment charts
Graph paper, Table 7.2 data, calculators, decay curve examples, half-life data table |
KLB Secondary Chemistry Form 4, Pages 201-204
|
|
| 2 | 3 |
RADIOACTIVITY
|
Half-Life Calculations and Problem Solving
Nuclear Reactions and Equations |
By the end of the
lesson, the learner
should be able to:
Solve complex half-life problems - Determine original amounts from remaining masses - Apply step-by-step and formula methods - Compare isotope decay rates |
Worked examples on half-life calculations using both methods
- Practice determining original amounts - Study various isotope half-lives - Comprehensive problem-solving sessions |
Calculators, comprehensive problem sets, worked examples, isotope half-life comparison tables
Nuclear equation examples, periodic table, conservation law charts, practice worksheets |
KLB Secondary Chemistry Form 4, Pages 204-206
|
|
| 2 | 4-5 |
RADIOACTIVITY
|
Radioactive Decay Series and Sequential Reactions
Nuclear Fission and Chain Reactions Nuclear Fusion and Energy Comparisons Medical and Diagnostic Applications |
By the end of the
lesson, the learner
should be able to:
Explain sequential radioactive decay - Trace decay series pathways - Identify stable end products - Complete partial decay series Define nuclear fusion process - Compare fusion with fission processes - Write fusion equations - Explain stellar energy production and fusion applications |
Study thorium-232 decay series example
- Trace sequential alpha and beta emissions - Identify stable lead-208 endpoint - Practice completing decay series with missing nuclides Study hydrogen fusion examples - Compare fusion vs fission characteristics and energy yields - Stellar fusion processes - Hydrogen bomb vs nuclear reactor principles |
Decay series charts, thorium series diagram, nuclide stability charts, practice decay series
Fission reaction diagrams, chain reaction illustrations, nuclear reactor diagrams, energy calculation examples Fusion reaction diagrams, comparison tables, stellar fusion charts, energy comparison data Medical radioisotope charts, treatment procedure diagrams, diagnostic equipment images, case studies |
KLB Secondary Chemistry Form 4, Pages 206-207
KLB Secondary Chemistry Form 4, Pages 207-208 |
|
| 3 | 1 |
RADIOACTIVITY
|
Industrial, Agricultural and Dating Applications
|
By the end of the
lesson, the learner
should be able to:
Explain industrial leak detection - Describe agricultural monitoring techniques - Discuss carbon-14 dating principles - Analyze food preservation methods |
Study leak detection using short half-life isotopes
- Carbon-14 dating of archaeological materials - Phosphorus tracking in agriculture - Gamma radiation food preservation |
Carbon dating examples, agricultural application charts, industrial use diagrams, food preservation data
|
KLB Secondary Chemistry Form 4, Pages 208-209
|
|
| 3 | 2 |
RADIOACTIVITY
|
Radiation Hazards and Environmental Impact
|
By the end of the
lesson, the learner
should be able to:
Identify radiation health hazards - Explain genetic mutation effects - Discuss major nuclear accidents - Analyze long-term environmental contamination |
Study Chernobyl and Three Mile Island accidents
- Genetic mutation and cancer effects - Long-term radiation exposure consequences - Nuclear waste disposal challenges |
Accident case studies, environmental impact data, radiation exposure charts, contamination maps
|
KLB Secondary Chemistry Form 4, Pages 209-210
|
|
| 3 | 3 |
RADIOACTIVITY
|
Safety Measures and International Control
|
By the end of the
lesson, the learner
should be able to:
Explain radiation protection principles - Describe proper storage and disposal methods - Discuss IAEA role and standards - Analyze monitoring and control systems |
Study IAEA guidelines and international cooperation
- Radiation protection protocols and ALARA principle - Safe storage, transport and disposal methods - Environmental monitoring systems |
IAEA guidelines, safety protocol charts, monitoring equipment diagrams, international cooperation data
|
KLB Secondary Chemistry Form 4, Pages 209-210
|
|
| 3 | 4-5 |
RADIOACTIVITY
|
Half-Life Problem Solving and Graph Analysis
Nuclear Equations and Conservation Laws |
By the end of the
lesson, the learner
should be able to:
Solve comprehensive half-life problems - Analyze experimental decay data - Plot and interpret decay curves - Determine half-lives graphically Balance complex nuclear equations - Complete nuclear reaction series - Identify unknown nuclides using conservation laws - Apply mass-energy relationships |
Plot decay curves from experimental data
- Determine half-lives from graphs - Analyze count rate vs time data - Complex half-life calculation problems Practice balancing nuclear reactions with multiple steps - Complete partial decay series - Identify missing nuclides using conservation principles - Mass-energy calculation problems |
Graph paper, experimental data sets, calculators, statistical analysis examples, comprehensive problem sets
Nuclear equation worksheets, periodic table, decay series diagrams, conservation law examples |
KLB Secondary Chemistry Form 4, Pages 199-210
|
|
| 4 | 1 |
REVISION
Chemistry Paper 1 Revision Chemistry Paper 1 Revision |
Section A: Short Answer Questions
|
By the end of the
lesson, the learner
should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations |
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
|
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts |
KLB Chemistry Bk 1–4, KCSE Past Papers
|
|
| 4 | 2 |
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision |
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations |
By the end of the
lesson, the learner
should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback |
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
|
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard |
KCSE Past Papers, Teachers’ Guide
|
|
| 4 | 3 |
Chemistry Paper 2 Revision
|
Structured Questions: Calculations & Reactions
Integrated Exam Practice |
By the end of the
lesson, the learner
should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks |
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
|
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets |
KCSE Past Papers, Revision Kits
|
|
| 4 | 4-5 |
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision |
Quantitative Practical Skills
Qualitative Practical Skills Section A: Short Answer Questions Section A: Short Answer Questions Integrated Short Answer Practice |
By the end of the
lesson, the learner
should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions – practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses |
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme |
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers Past Chemistry Paper 1 exams, Marking Schemes Past Papers, Chalkboard, Chemistry Charts Full Past Paper 1, Answer Booklets, Marking Schemes |
KLB Chem Bk 1–4, KCSE Past Papers
KLB Chemistry Bk 1–4 |
|
| 5 | 1 |
Chemistry Paper 2 Revision
|
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions |
By the end of the
lesson, the learner
should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions |
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
|
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts |
KLB Chem Bk 2–4, KCSE Past Papers
|
|
| 5 | 2 |
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision |
Integrated Exam Practice
Quantitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme |
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
|
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 5 | 3 |
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision |
Qualitative Practical Skills
Section A: Short Answer Questions |
By the end of the
lesson, the learner
should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes |
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
|
Laboratory apparatus, Reagents, Past Papers
Past Chemistry Paper 1 exams, Marking Schemes |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 5 | 4-5 |
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision |
Section A: Short Answer Questions
Integrated Short Answer Practice Structured Questions: Analysis & Explanations Structured Questions: Calculations & Reactions |
By the end of the
lesson, the learner
should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses - attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions |
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations |
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard Calculators, Revision Exercises, Charts |
KLB Chemistry Bk 1–4
KLB Chem Bk 2–4, KCSE Past Papers |
|
| 6 | 1 |
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision |
Integrated Exam Practice
Quantitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme |
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
|
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 6 | 2 |
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision |
Qualitative Practical Skills
Section A: Short Answer Questions |
By the end of the
lesson, the learner
should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes |
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
|
Laboratory apparatus, Reagents, Past Papers
Past Chemistry Paper 1 exams, Marking Schemes |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 6 | 3 |
Chemistry Paper 1 Revision
|
Section A: Short Answer Questions
Integrated Short Answer Practice |
By the end of the
lesson, the learner
should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses |
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
|
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes |
KLB Chemistry Bk 1–4
|
|
| 6 | 4-5 |
Chemistry Paper 2 Revision
Chemistry Paper 2 Revision Chemistry Paper 3 Revision |
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions Integrated Exam Practice Quantitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions - integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme |
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas |
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts Past Papers, Marking Schemes, Exam Answer Sheets Laboratory apparatus, Past Papers |
KLB Chem Bk 2–4, KCSE Past Papers
KLB Chem Bk 1–4, KCSE Past Papers |
|
| 7 | 1 |
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision |
Qualitative Practical Skills
Section A: Short Answer Questions |
By the end of the
lesson, the learner
should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes |
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
|
Laboratory apparatus, Reagents, Past Papers
Past Chemistry Paper 1 exams, Marking Schemes |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 7 | 2 |
Chemistry Paper 1 Revision
|
Section A: Short Answer Questions
Integrated Short Answer Practice |
By the end of the
lesson, the learner
should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses |
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
|
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes |
KLB Chemistry Bk 1–4
|
|
| 7 | 3 |
Chemistry Paper 2 Revision
|
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions Integrated Exam Practice |
By the end of the
lesson, the learner
should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions |
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
|
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts Past Papers, Marking Schemes, Exam Answer Sheets |
KLB Chem Bk 2–4, KCSE Past Papers
|
|
| 7 | 4-5 |
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision |
Quantitative Practical Skills
Qualitative Practical Skills Section A: Short Answer Questions |
By the end of the
lesson, the learner
should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions – attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations |
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion |
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers Past Chemistry Paper 1 exams, Marking Schemes Past Papers, Chalkboard, Chemistry Charts |
KLB Chem Bk 1–4, KCSE Past Papers
KLB Chemistry Bk 1–4, KCSE Past Papers |
|
| 8 | 1 |
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision |
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations |
By the end of the
lesson, the learner
should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback |
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
|
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard |
KCSE Past Papers, Teachers’ Guide
|
|
| 8 | 2 |
Chemistry Paper 2 Revision
|
Structured Questions: Calculations & Reactions
Integrated Exam Practice |
By the end of the
lesson, the learner
should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks |
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
|
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets |
KCSE Past Papers, Revision Kits
|
|
| 8 | 3 |
Chemistry Paper 3 Revision
|
Quantitative Practical Skills
Qualitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions |
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
|
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 8 | 4-5 |
Chemistry Paper 1 Revision
Chemistry Paper 1 Revision Chemistry Paper 2 Revision |
Section A: Short Answer Questions
Integrated Short Answer Practice Structured Questions: Analysis & Explanations |
By the end of the
lesson, the learner
should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations – integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback |
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors |
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts Full Past Paper 1, Answer Booklets, Marking Schemes Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard |
KLB Chemistry Bk 1–4, KCSE Past Papers
KCSE Past Papers, Teachers’ Guide |
|
| 9 | 1 |
Chemistry Paper 2 Revision
|
Structured Questions: Calculations & Reactions
Integrated Exam Practice |
By the end of the
lesson, the learner
should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks |
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
|
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets |
KCSE Past Papers, Revision Kits
|
|
| 9 | 2 |
Chemistry Paper 3 Revision
|
Quantitative Practical Skills
Qualitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions |
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
|
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers |
KLB Chem Bk 1–4, KCSE Past Papers
|
|
| 9 | 3 |
Chemistry Paper 1 Revision
|
Section A: Short Answer Questions
|
By the end of the
lesson, the learner
should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations |
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
|
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts |
KLB Chemistry Bk 1–4, KCSE Past Papers
|
|
| 9 | 4-5 |
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision Chemistry Paper 2 Revision Chemistry Paper 3 Revision Chemistry Paper 3 Revision |
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations Structured Questions: Calculations & Reactions Integrated Exam Practice Quantitative Practical Skills Qualitative Practical Skills |
By the end of the
lesson, the learner
should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback - solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks |
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls |
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard Calculators, Revision Exercises, Charts Past Papers, Marking Schemes, Exam Answer Sheets Laboratory apparatus, Past Papers Laboratory apparatus, Reagents, Past Papers |
KCSE Past Papers, Teachers’ Guide
KCSE Past Papers, Revision Kits |
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