Class: Senior Secondary School 2 (SS2 / SSS2)
Term: 1st Term
Week: 6
Age: 16 years
Duration: 45 minutes
Subject: Music
Curriculum Theme: Elements of Music Theory
Previous Lesson: Triads and Tonality: Meaning, Inversions and Chord Identification.
Topic: Diatonic Intervals (Melodic) and Pitch.
Subject Matter: Meaning of diatonic intervals, melodic intervals, pitch, inverted intervals, and the table of intervals and inversions.

Specific Objectives

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

Cognitive Domain:

Define diatonic intervals.
Explain what melodic intervals are.
Describe the concept of pitch in music.
Identify inverted intervals and their relationships.

Affective Domain:

Appreciate the importance of understanding intervals for musical analysis.
Show interest in analyzing the structure of musical compositions.

Psychomotor Domain:

Draw and identify diatonic and melodic intervals on the musical staff.
Demonstrate how to invert intervals.
Complete a table showing intervals and their inversions.

Participate actively in discussions regarding interval identification and inversion.

Reference Materials

The following resources were used in planning this lesson:

Senior Secondary Schools Education Curriculum
State Unified Scheme of Work
Adegbite, A. (2010). Fundamentals of Music Theory for Senior Secondary Schools. Lagos: University Press Plc.

Instructional Materials

The teacher will teach this lesson with the aid of:

Keyboard
Staff board
Interval chart
Manuscript paper
Markers/Chalk

Rationale for the Lesson

Understanding diatonic intervals, melodic intervals, and pitch helps pupils to grasp the fundamental building blocks of harmony and melody in music. This knowledge is essential for analyzing, composing, and performing music effectively, enabling pupils to better understand musical relationships.

Prerequisite/Previous Knowledge

Pupils should have basic knowledge of musical notes, the staff, clefs, and how to identify notes on the staff.

Lesson Content/Board Summary

Diatonic Intervals, Melodic Intervals, and Pitch

Meaning of Diatonic Intervals

A diatonic interval is the distance between two notes that belong to the same major or minor scale (key). These intervals are named based on the number of scale steps between the two notes, including the starting and ending notes.

Meaning of Melodic Intervals

A melodic interval occurs when two notes are played or sung one after the other. It refers to the musical distance between successive notes in a melody. Melodic intervals can move upwards or downwards.

Understanding Pitch

Pitch refers to how high or low a musical note sounds. It is determined by the frequency of the sound wave, with higher frequencies producing higher pitches and lower frequencies producing lower pitches.

Interval Counting on the Staff

To count intervals on the staff, count every line and space between the two notes, including the starting and ending notes.

Line to Line: If starting on a line, the next line is a 3rd, the next line after that is a 5th, etc.
Space to Space: If starting in a space, the next space is a 3rd, the next space after that is a 5th, etc.
Line to Space: If starting on a line, the next space is a 2nd, the next space after that is a 4th, etc.

Inverted Intervals

An inverted interval is created by moving the lower note of an interval up an octave, or by moving the upper note down an octave. The sum of an interval and its inversion always equals nine (9).

Rules for Inverting Intervals:

To find the numerical value of an inverted interval, subtract the original interval number from 9.
Major intervals invert to minor intervals.
Minor intervals invert to major intervals.
Perfect intervals invert to perfect intervals.
Augmented intervals invert to diminished intervals.
Diminished intervals invert to augmented intervals.

Table of Intervals and Inversions

The following table shows common intervals and their inversions:

Unison (1st) ↔ Octave (8th) (9 – 1 = 8)
Second (2nd) ↔ Seventh (7th) (9 – 2 = 7)
Third (3rd) ↔ Sixth (6th) (9 – 3 = 6)
Fourth (4th) ↔ Fifth (5th) (9 – 4 = 5)

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils, reviews the previous lesson on basic music notation, and then introduces the topic of diatonic intervals, melodic intervals, and pitch.
Pupils’ Activity: Pupils respond to greetings, recall the previous lesson, and listen attentively to the introduction of the new topic.
Learning Point: Pupils are prepared for the new lesson and connect it to their prior knowledge.

Step 2: Explanation of Diatonic and Melodic Intervals

Time: 8 minutes
Teaching Skill: Explanation/Lecturing
Teacher’s Activity: The teacher explains the meaning of diatonic intervals as the distance between notes within a key and melodic intervals as notes played consecutively. The teacher uses the staff board to show examples.
Pupils’ Activity: Pupils listen to the explanation and observe the examples on the staff board.
Learning Point: Pupils understand the definitions and visual representation of diatonic and melodic intervals.

Step 3: Understanding Pitch

Time: 5 minutes
Teaching Skill: Explanation
Teacher’s Activity: The teacher explains pitch as the highness or lowness of a sound, demonstrating with a keyboard or by singing different notes.
Pupils’ Activity: Pupils listen to the explanation and observe the demonstration of different pitches.
Learning Point: Pupils grasp the concept of pitch and its auditory characteristics.

Step 4: Interval Counting on the Staff

Time: 7 minutes
Teaching Skill: Demonstration
Teacher’s Activity: The teacher demonstrates how to count intervals on the staff, emphasizing counting lines and spaces between notes (e.g., line-to-line, space-to-space, line-to-space).
Pupils’ Activity: Pupils observe carefully and practice counting intervals mentally or by drawing simple examples.
Learning Point: Pupils learn the practical method of identifying and naming intervals on the staff.

Step 5: Introduction to Inverted Intervals

Time: 8 minutes
Teaching Skill: Explanation/Demonstration
Teacher’s Activity: The teacher explains the concept of inverted intervals, showing how an interval changes when one of its notes is moved an octave up or down. The teacher explains the rule that an interval plus its inversion equals nine.
Pupils’ Activity: Pupils listen, ask questions for clarity, and try to grasp the concept of inversion.
Learning Point: Pupils understand what inverted intervals are and the basic rule for their calculation.

Step 6: Table of Intervals and Inversions

Time: 7 minutes
Teaching Skill: Chart Presentation/Explanation
Teacher’s Activity: The teacher presents the table of intervals and their inversions, explaining the relationship between major/minor and perfect intervals when inverted. The teacher guides pupils to write down the table.
Pupils’ Activity: Pupils copy the table of intervals and inversions into their notebooks.
Learning Point: Pupils consolidate their understanding of interval inversion through a structured table.

Step 7: Evaluation/Review

Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

Define a diatonic interval.
What is a melodic interval?
How is pitch described in music?
Explain how to invert an interval using an example.
What is the inversion of a 3rd?

Pupils’ Activity: Pupils answer orally and in writing.
Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization
Teacher’s Activity: The teacher summarizes the key points of the lesson, emphasizing the importance of intervals and pitch in music theory. The teacher assigns homework for pupils to practice identifying and inverting intervals on manuscript paper.
Pupils’ Activity: Pupils listen to the summary and note down the homework.
Learning Point: Pupils review the lesson and are given tasks to reinforce their learning.

Lesson Keywords

Diatonic – Notes within a specific key or scale.
Melodic – Notes played or sung sequentially.
Pitch – How high or low a sound is.
Interval – The distance between two musical notes.
Inversion – Flipping an interval by moving one note an octave.
Staff – The five horizontal lines and four spaces on which musical notes are written.

Differentiation

For pupils who grasp concepts quickly, the teacher can provide more complex interval identification exercises. For those needing additional support, the teacher will offer one-on-one guidance, simplify examples, and provide visual aids like flashcards with common intervals.

Note for teachers using this lesson plan

Ensure that the staff board is clearly visible to all pupils. Encourage active participation by asking pupils to come to the board to identify or draw intervals. Use the keyboard to play examples of intervals and pitches to enhance auditory learning. Emphasize the practical application of intervals in understanding melodies and harmonies.