Lesson 7
Lesson Objectives
Apply core elements and techniques of classification writing.
Establish and organize information into clear categories.
Analyze model classification essays to understand structural components.
Compose a complete short classification essay using accurate grammar and vocabulary.
Concept of Classification and Categorization
Logic of List Organization:
Item lists, such as shopping lists, can be created randomly or structured logically by grouping related items together.
Organizing items based on location or shared properties increases efficiency and clarity.
Categorization Practice:
Unsorted list of food items: bananas, eggs, peppers, beans, milk, yoghurt, rice, pasta, chicken, beef, tinned tuna, mangoes.
Strategies for grouping items:
Group items found together in specific store departments, such as dairy or tinned and packaged goods.
Assign descriptive category names to each group that reflect shared traits (e.g., Fruit, Vegetables, Dairy, Grains, Proteins).
Categorized results:
Fruit: mangoes, bananas
Vegetables: beans, peppers
Dairy: yoghurt, milk
Grains: pasta, rice
Proteins: chicken, tinned tuna, beef, eggs
Definition of Classification:
Classification is the systematic process of organizing ideas, items, or concepts into distinct categories based on shared characteristics.
Fundamental Steps in Classification Writing
Step 1: Introduce:
Present the topic clearly in the opening sentence or paragraph.
State the main subject and explicitly name the categories to be discussed.
Step 2: Classify:
Divide the central topic into distinct categories.
Assign a separate body paragraph to each individual category.
Step 3: Describe:
Elaborate on the defining traits and shared characteristics of items in each category within their respective body paragraphs.
Step 4: Conclude:
Re-examine all categories together in a concluding paragraph.
Summarize the main points and provide a final perspective on the overall topic.
Strategies for Reading and Analyzing Classification Models
Skimming Protocol (2-Minute Strategy):
Read the main title and review all accompanying images, figures, and captions.
Read the introduction and conclusion paragraphs rapidly.
Read the topic sentence (first sentence) of each body paragraph to capture overarching themes.
Analysis Protocol:
Identify category indicators and underline key descriptive vocabulary.
Map out essay structure across three major sections: Introduction (topic and category names), Body (categorization and detailed traits), and Conclusion (synthesis and closing remarks).
Model Essay Analysis: Flying Machines
Structure and Content of the Model Essay:
Introduction:
Highlights long-standing human experimentation with flying machines prior to aeroplanes.
Defines the topic and sets up two main categories based on propulsion and movement: machines dependent on air currents and machines powered by engines.
Body Paragraph 1: Air Current Dependent Machines (Hot-air Balloons and Gliders):
Hot-air balloons and gliders move using natural air currents.
Hot-air balloon pilots steer by ascending or descending into active air currents, managing elevation by heating internal air or allowing it to cool naturally.
Gliders use air currents to soar and glide; small powered planes pull gliders along runways for initial takeoff, after which long wingspans and strong airframes allow unpowered flight.
Primary usage: Recreational purposes, fun, and adventure.
Body Paragraph 2: Engine-Powered Machines (Helicopters):
Helicopters were first introduced during World War II.
Helicopters rely on engines that spin rotor blades at high speeds to generate lift and climb into the sky.
Unlike aeroplanes that require continuous forward motion, helicopters can remain stationary (hover) in a single airspace location for extended periods.
Primary usage: Medical evacuations, military operations, and tourist sightseeing flights.
Conclusion:
Summarizes that aeroplanes are only one of several ways to travel through the air and poses a concluding question regarding personal flight preferences.
Key Analytical Findings:
Main Topic: Different types of non-aeroplane flying aircraft.
Number of Categories: Two distinct groups.
Category Breakdown:
Group 1: Hot-air balloons and gliders (Movement: Air currents; Actions: Ascending, descending, soaring, gliding; Purpose: Fun/adventure).
Group 2: Helicopters (Movement: Engine-driven spinning blades; Actions: Vertical climb, stationary hovering; Purpose: Medical, military, sightseeing).
Explanatory Method: Comparative analysis is used to contrast helicopter mechanics and hovering ability with conventional aeroplanes.
Writing Guidelines for Animal Flight Essay
Assignment Requirements:
Task: Write a short classification essay describing two distinct types of animal flight.
Length: 110–130 words.
Pre-Writing Techniques:
Utilize effective planning methods such as brainstorming, freewriting, list generation, sentence starters, and graphic organizers.
Gather factual details regarding flight characteristics and evolution.
Comparative Case Study Data:
Animal 1: Colugo ("Flying Lemur")
- Nature: Neither true lemurs nor capable of powered flight; they are gliders.
- Physical Traits: Lack wings; possess webbed limbs with extensive skin membranes (patagium) extending between legs, tail, and neck.
- Movement Mechanism: Glide through forest foliage when leaping between trees.
- Habitat & Behavior: Inhabit high forest canopies to forage, locate mates, and defend territorial boundaries.
Animal 2: Bat
- Nature: The only mammals capable of sustained powered flight.
- Physical Traits: Wings consist of thin skin stretched across elongated finger bones. Wings are significantly thinner and contain more individual bones than feathery bird wings.
- Movement Mechanism: Active flapping; upstrokes flick wings upward and backward to generate additional lift.
- Habitat & Behavior: Nocturnal flight to avoid predatory birds; utilize advanced navigation systems (echolocation) to hunt insects in flight.
Sample Model Essay: Animal Flight
Introductory Paragraph: Flight is a specialized locomotion trait present in three primary animal groups: birds, insects, and bats. While birds, insects, and bats are the only creatures capable of true powered flight, several animals can glide or appear to fly, with the colugo serving as a notable example.
First Body Paragraph (Bat Flight): Bats are the only mammals that can fly and sustain flight. Their arms stretch into webbed wings made of thin skin supported by elongated fingers. To fly, they flap their spread-out fingers. Because bat wings are formed from skin membranes, they are much thinner and contain more bones than feathery bird wings. Bats rely on an advanced navigation system while flying at night to capture insects and evade predators.
Second Body Paragraph (Colugo Flight): Flying lemurs, or colugos, are neither true lemurs nor true fliers. They reside high in tree canopies and feature flaps of skin between their legs, tail, and neck. Using webbed limbs, they glide across forest distances. They spend most of their time in trees hunting, locating mates, and defending territory.
Concluding Paragraph: While structural wings are critical for powered flight, lacking wings does not prevent an animal from airborne movement, as demonstrated by the colugo.
Revision Guidelines and Evaluation Rubric
Revision Checkpoints:
Ensure all four core steps are executed: Introduce, Classify, Describe, and Conclude.
Confirm that unique and shared traits of each category are thoroughly described.
Perform a quiet vocal reading of the draft to verify coherence, natural flow, and structural stability.
Assessment Rubric Grid:
Scoring Scale: 4 = Excellent, 3 = Good, 2 = Needs Improvement, 1 = Re-do.
Writing Criteria: Essay is organized logically into distinct categories with adequate supporting details describing each category.
Grammatical Accuracy: Correct usage of past perfect and past perfect continuous verb forms.
Vocabulary Selection: Appropriate and varied selection of general and unit-specific vocabulary.
