Class: Senior Secondary School 1 (SS1 / SSS 1)
Term: 1st Term
Week: 9
Age: 15 years
Duration: 45 minutes
Subject: Book Keeping
Curriculum Theme: Trade
Previous Lesson: Source Documents: Meaning and Types of Source Documents.
Topic: Source document
Subject Matter: Contents of source documents, Uses of source documents
Specific Objectives
By the end of the lesson, pupils should be able to:
Cognitive Domain:
- Define source documents.
- Identify the common contents of various source documents.
- State at least three uses of source documents.
Affective Domain:
- Appreciate the importance of source documents in business transactions.
- Show willingness to handle source documents carefully.
Psychomotor Domain:
- Prepare a simple receipt or invoice given a scenario.
- Sort different types of source documents correctly.
Social Domain:
- Collaborate with peers in discussing the role of source documents in maintaining accurate records.
Reference Materials
The following resources were used in planning this lesson:
- 9 Years Basic Education Curriculum for Business Studies (Book Keeping section).
- State Unified Scheme of Work for Senior Secondary School Book Keeping.
- Omoniyi, O.S. (2018). Simplified Book-Keeping and Accounts for Senior Secondary Schools. Lagos: Learn Africa Plc.
Instructional Materials
The teacher will teach this lesson with the aid of:
- Samples of various source documents (e.g., receipts, invoices, payment vouchers, cheque counterfoils).
- Whiteboard and markers.
- Charts showing examples of source documents.
Rationale for the Lesson
This lesson helps pupils understand the foundational documents used in recording business transactions. Knowing about source documents enables pupils to properly identify and use them in daily business activities, ensuring accurate financial record-keeping.
Prerequisite/Previous Knowledge
Pupils have a basic understanding of business transactions and the need for records in a business.
Lesson Content/Board Summary
Source Documents
Definition of Source Documents
Source documents are original written pieces of evidence that record the details of a business transaction. They are the first official record of a transaction and provide the necessary information for entries into the books of accounts.
Examples of source documents include:
- Receipts
- Invoices (Sales Invoice, Purchase Invoice)
- Debit Notes
- Credit Notes
- Payment Vouchers
- Cheque Counterfoils
Contents of Source Documents
Although contents vary slightly depending on the type of document, common information found on most source documents includes:
- The name and address of the business issuing the document.
- The name and address of the party involved in the transaction (customer/supplier).
- A unique document number (e.g., receipt number, invoice number).
- The date of the transaction.
- A clear description of the goods or services involved.
- The quantity, unit price, and total amount of the transaction.
- Terms of payment (e.g., cash, credit).
- Signature or stamp of the issuer.
Uses of Source Documents
Source documents are important for several reasons in business:
- Evidence of Transaction: They serve as legal proof that a transaction occurred.
- Basis for Recording: They provide the necessary information (date, amount, parties) to record transactions in ledgers and journals.
- Audit Trail: They allow auditors to trace transactions from their origin to their final entry in the books.
- Dispute Resolution: They can be used to resolve disagreements between buyers and sellers regarding transactions.
- Internal Control: They help in monitoring and controlling business activities and preventing fraud.
- Tax Purposes: They are often required by tax authorities for tax assessment.
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 and asks them to recall what they understand by “business transaction” and why it is important to keep records. The teacher then introduces the topic by asking how businesses prove that a transaction happened.
Pupils’ Activity: Pupils respond to the questions and share their ideas.
Learning Point: Pupils are reminded of previous knowledge and are prepared for the new topic.
Step 2: Definition of Source Documents
Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines source documents, explaining that they are the original evidence of a transaction. The teacher shows samples of different source documents like receipts and invoices and asks pupils to identify them.
Pupils’ Activity: Pupils listen, observe the samples, and identify the documents shown by the teacher.
Learning Point: Pupils understand what source documents are and can identify common types.
Step 3: Contents of Source Documents
Time: 10 minutes
Teaching Skill: Illustration/Analysis
Teacher’s Activity: The teacher distributes copies of a sample receipt and invoice or displays them on a chart. The teacher guides pupils to identify and list the common contents found on these documents, such as date, parties, description, amount, etc.
Pupils’ Activity: Pupils examine the sample documents and identify their contents, listing them on their notebooks.
Learning Point: Pupils can identify the essential information contained in source documents.
Step 4: Uses of Source Documents
Time: 10 minutes
Teaching Skill: Elaboration/Discussion
Teacher’s Activity: The teacher explains the various uses of source documents, emphasizing their importance as evidence, for recording, for auditing, and for resolving disputes. The teacher encourages pupils to give real-life examples.
Pupils’ Activity: Pupils listen, ask questions, and contribute examples from their experiences or observations.
Learning Point: Pupils understand the practical importance and uses of source documents in business.
Step 5: Evaluation/Review
Time: 5 minutes
Teaching Skill: Questioning/Assessment
Teacher’s Activity: The teacher evaluates the learning by asking the following questions:
- Define a source document.
- Mention three common contents found on an invoice.
- List three uses of source documents in a business.
- Give two examples of source documents.
Pupils’ Activity: Pupils answer orally and in writing.
Learning Point: Pupils demonstrate understanding of the lesson.
Step 6: Conclusion
Time: 3 minutes
Teaching Skill: Summarisation
Teacher’s Activity: The teacher summarizes the lesson by reiterating the definition, contents, and uses of source documents. The teacher encourages pupils to always demand and keep source documents for any transaction they engage in.
Pupils’ Activity: Pupils listen and ask any final questions.
Learning Point: Pupils have a consolidated understanding of the topic.
Lesson Keywords
- Source Document – Original written evidence of a business transaction.
- Receipt – A document acknowledging that a person has received money or property.
- Invoice – A document issued by a seller to a buyer, listing goods or services provided, and the amount due.
- Debit Note – A document issued by a seller to correct an undercharge or to indicate a return of goods.
- Credit Note – A document issued by a seller to correct an overcharge or to grant an allowance.
Differentiation
For pupils who grasp concepts quickly, the teacher can provide additional complex scenarios requiring them to identify appropriate source documents or prepare more detailed ones. For pupils who need more support, the teacher will use more visual aids, provide simpler examples, and offer one-on-one guidance to ensure understanding of basic definitions and uses.
Note for teachers using this lesson plan
Teachers should ensure they have various clear and legible samples of source documents to show pupils. Encourage pupils to bring in examples of receipts or invoices they might encounter in their daily lives. Emphasize the practical relevance of keeping and understanding these documents for personal and business financial literacy.

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