Grade 12 · Biology · Semester 1 · 2026–2027

Tracing the living world, from cellular energy to forensic biology.

Journey through the living dynamics of our planet this semester — from photosynthesis, ecological succession, and global warming, through microbiological techniques and immune defenses, to forensic science and past paper mastery.

Tap any point on the timeline — or any week below — to explore topic details.

The semester's progress across ecological & biological systems — click a point to jump to that week.
W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 W14 W15 W16 W17 W18 W19 W20 ◆ TODAY

Key Milestones & Assessment Checkpoints

Track important academic checkpoints, laboratory practicals, breaks, and exam preparation periods across the term.

Checkpoint

Ecology & Selection

Weeks 1–6 · Aug 23–Sep 27

Covers energy flow, photosynthesis, ecology, succession, global warming, and natural selection.

Practical Lab

Aseptic Technique Lab

Week 9 · Oct 18

Hands-on application of culturing microorganisms using proper aseptic techniques.

Checkpoint

Immunity & Pathogens

Weeks 10–12 · Oct 25–Nov 8

Covers routes of pathogen entry, cellular immune responses (B & T cells), and antibiotics.

Preparation

Past Paper Revision

Weeks 16–18 · Dec 6–Dec 20

Intensive past paper practice across Unit 4 and Unit 6 to solidify exam technique.

Final Evaluation

Semester 1 Exams

Weeks 19–20 · Dec 27–Jan 3

Cumulative semester assessment covering all module concepts and practical skills.

W1
Aug 23
Photosynthesis & Energy Flow
Unit 4: Energy flow, ecosystems & environment
  • Introduction to light-dependent and light-independent reactions
  • Energy transfer through ecosystems and trophic efficiency

Key focus: Photosynthesis provides the foundational energy input driving almost all biological ecosystems.

W2
Aug 30
Ecology & Ecosystem Dynamics
Unit 4: Energy flow, ecosystems & environment
  • Ecosystem structure, biotic and abiotic interactions
  • Niche concepts and species distributions

Key focus: Understanding species interactions reveals how balance is maintained within biological communities.

W3
Sep 6
Ecological Succession
Unit 4: Energy flow, ecosystems & environment
  • Primary and secondary ecological succession
  • Climax communities and environmental change

Key focus: Illustrates how communities predictably change and adapt over ecological time.

W4
Sep 13
Global Warming & Climate Drivers
Unit 4: Energy flow, ecosystems & environment
  • The greenhouse effect and greenhouse gases
  • Impacts of rising temperatures on ecosystems and biodiversity

Key focus: Connects biochemical cycles to large-scale global environmental challenges.

W5
Sep 20–24
National Vacation (Sep 23 & 24) & Global Warming
Break · National Vacation
Vacation
  • Continued study of global warming evidence and models
  • National holiday pause (Sep 23 & 24)

Key focus: A short break alongside deep evaluation of climate trend data.

W6
Sep 27
Mitigating Climate Change & Natural Selection
Unit 4: Energy flow, ecosystems & environment
Unit Checkpoint
  • Strategies for reducing global warming and anthropogenic impact
  • Mechanisms of natural selection, speciation, and evolutionary change

Key focus: Shows how environmental pressure drives adaptation and biodiversity through natural selection.

W7
Oct 4
Microorganisms Overview
Unit 4: Microbiology, immunity & forensics
  • Introduction to bacteria, viruses, and fungi
  • Microbial structure and classification

Key focus: Establishes foundational knowledge for microbiology, infection, and forensic analysis.

W8
Oct 11
Growth of Bacteria
Unit 4: Microbiology, immunity & forensics
  • Bacterial growth phases (lag, log, stationary, death)
  • Factors affecting microbial growth rates

Key focus: Essential for understanding infection kinetics and industrial applications of microbiology.

W9
Oct 18
Microbiological Culturing & Aseptic Technique
Unit 4: Microbiology, immunity & forensics
Lab Practical
  • Principles and practical methods for culturing bacteria
  • Mastering aseptic techniques to prevent contamination

Key focus: A crucial laboratory skill set required for safe biological experimentation.

W10
Oct 25
Pathogen Entry & Host Defense Barriers
Unit 4: Microbiology, immunity & forensics
  • Major transmission routes pathogens use to enter the human body
  • Primary physical and chemical barriers against infection

Key focus: Understanding entry vectors is key to preventing disease transmission.

W11
Nov 1
Adaptive Immunity: B & T Lymphocytes
Unit 4: Microbiology, immunity & forensics
Immunity Review
  • Roles of B cells: B memory and B effector cells
  • Roles of T cells: T helper, T killer, and T memory cells

Key focus: Explains the specificity and memory mechanisms of the human immune system.

W12
Nov 8
Antibiotics & Antimicrobial Action
Unit 4: Microbiology, immunity & forensics
  • Mechanisms of antibiotic action against bacterial structures
  • Antibiotic resistance and clinical implications

Key focus: Connects cellular microbiology directly to pharmacology and public health.

W13
Nov 15
Forensic Science & DNA Profiling
Unit 6: Forensic Science
  • Introduction to forensic biology techniques
  • DNA profiling, PCR, and gel electrophoresis

Key focus: Demonstrates modern molecular biology applications in criminal justice and identification.

W14
Nov 22
Autumn Break
Break · Autumn Break
Break
  • Scheduled term break — no classes

Key focus: A well-earned opportunity to rest and recharge mid-semester.

W15
Nov 29
Advanced Forensic Analysis
Unit 6: Forensic Science
  • Time of death estimation (decomposition, rigor mortis, body temp)
  • Entomology and forensic case studies

Key focus: Integrates physiology, ecology, and chemistry to solve analytical forensic problems.

W16
Dec 6
Unit 6 Past Paper Review
Unit 6: Past Paper Practice
Revision
  • Solving Unit 6 past exam papers
  • Exam technique, command words, and mark scheme analysis

Key focus: Builds target exam fluency and refines analytical answer structuring.

W17
Dec 13
Unit 4 Past Paper Review (Part 1)
Unit 4: Past Paper Practice
Revision
  • Focused past paper practice on Ecology & Global Warming
  • Targeted practice on Microbiology topics

Key focus: Identifies knowledge gaps across core Unit 4 content areas.

W18
Dec 20
Unit 4 Past Paper Review (Part 2)
Unit 4: Past Paper Practice
Revision
  • Focused past paper practice on Immunity & Pathogens
  • Comprehensive exam revision strategy

Key focus: Final consolidation of biological concepts prior to semester examinations.

W19
Dec 27
Semester 1 Exams Start
Semester 1 Examinations
Final Exams
  • Semester 1 final examination period commences
  • Comprehensive assessment of Units 4 & 6

Key focus: Demonstrates holistic mastery of semester learning objectives.

W20
Jan 3
Semester 1 Exams Conclude
Semester 1 Examinations
Final Exams
  • Final exam completions and semester wrap-up

Key focus: Marks the completion of Semester 1 academic requirements.