Lesson Note on Surveying Equipment: Meaning and Common Tools for SS 2

Class: Senior Secondary School 2 (SS2 / SSS2)
Term: 3rd Term
Week: 5
Age: 16 years
Duration: 45 minutes
Subject: Agricultural Science
Curriculum Theme: Farm Management and Planning
Previous Lesson: Farm Surveying and Planning: Meaning and Importance.
Topic: Surveying equipment
Subject Matter: Meaning of surveying equipment (tools used to measure and mark land), common surveying equipment (ranging pole, measuring tape, peg, gunters chain, theodolite)

Specific Objectives

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

Cognitive Domain:

• Define surveying equipment.
• List common surveying equipment.
• State the uses of various surveying equipment.

Affective Domain:

• Appreciate the importance of proper handling and maintenance of surveying equipment.

Psychomotor Domain:

• Identify actual surveying equipment when presented.
• Demonstrate the proper handling of simple surveying equipment.

Social Domain:

• Work cooperatively in groups during practical demonstrations involving surveying equipment.

Reference Materials

The following resources were used in planning this lesson:

• Senior Secondary Schools Education Curriculum
• State Unified Scheme of Work
• Essential Agricultural Science for Senior Secondary Schools, by O.A. Iwena

Instructional Materials

The teacher will teach this lesson with the aid of:

• Ranging pole
• Measuring tape
• Pegs
• Chain
• Pictures of a theodolite

Rationale for the Lesson

This lesson helps pupils understand the tools used to measure and mark land, which is important for planning and laying out farms. Knowing about surveying equipment enables pupils to carry out basic farm planning and land management tasks effectively.

Prerequisite/Previous Knowledge

Pupils have some basic knowledge of farm tools and the concept of land measurement from previous agricultural science lessons.

Lesson Content/Board Summary

Surveying Equipment

Meaning of Surveying Equipment

Surveying equipment refers to the various tools and instruments used to measure and mark land. These tools are essential for determining boundaries, distances, angles, and elevations for agricultural purposes like farm layout, irrigation, and construction.

Common Surveying Equipment and Their Uses

The following are some common surveying equipment and their uses:

• Ranging Pole – Used to mark positions and lines when measuring distances. They are usually painted in alternate red and white bands for visibility.
• Measuring Tape – Used for measuring short to medium distances accurately. They are commonly made of steel, linen, or synthetic materials and come in various lengths (e.g., 30m, 50m).
• Peg – Used to mark specific points on the ground, such as boundaries, corners, or reference points. They are typically made of wood or metal.
• Gunter’s Chain – An older surveying tool, approximately 20 meters long, consisting of 100 links. It is used for measuring longer distances.
• Theodolite – A precision optical instrument used for measuring horizontal and vertical angles. It is essential for detailed land surveys and setting out lines and levels.

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, and introduces the new topic by asking pupils about tools used to measure land.
Pupils’ Activity: Pupils respond to questions and listen attentively to the introduction of the new topic.
Learning Point: Pupils recall prior knowledge and are prepared for the new lesson.

Step 2: Meaning of Surveying Equipment

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher explains the meaning of surveying equipment and its general importance in agriculture.
Pupils’ Activity: Pupils listen and take notes on the definition of surveying equipment.
Learning Point: Pupils understand what surveying equipment means.

Step 3: Ranging Pole and Measuring Tape

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher shows the ranging pole and measuring tape (or pictures) and explains their specific uses and how to handle them.
Pupils’ Activity: Pupils observe the equipment, listen to the explanations, and ask questions for clarity.
Learning Point: Pupils learn about the ranging pole and measuring tape.

Step 4: Pegs and Gunter’s Chain

Time: 8 minutes
Teaching Skill: Demonstration/Explanation
Teacher’s Activity: The teacher presents pegs and Gunter’s chain (or pictures), describing their uses and importance in surveying.
Pupils’ Activity: Pupils pay attention, make notes, and identify the equipment.
Learning Point: Pupils understand the roles of pegs and Gunter’s chain.

Step 5: Theodolite

Time: 5 minutes
Teaching Skill: Visual Aids/Explanation
Teacher’s Activity: The teacher shows a picture of a theodolite and explains its advanced function in measuring angles for precise surveys.
Pupils’ Activity: Pupils observe the picture and listen to the explanation of the theodolite’s use.
Learning Point: Pupils gain knowledge about the theodolite.

Step 6: Proper Handling and Maintenance

Time: 5 minutes
Teaching Skill: Discussion
Teacher’s Activity: The teacher leads a discussion on the importance of proper handling, cleaning, and storage of surveying equipment to ensure their longevity and accuracy.
Pupils’ Activity: Pupils contribute ideas and learn about the care of the equipment.
Learning Point: Pupils understand the need for proper handling and maintenance.

Step 7: Evaluation/Review

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

1. What is surveying equipment?
2. Mention three common surveying equipment.
3. State one use for a ranging pole and a measuring tape.
4. Why is it important to handle surveying equipment properly?

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 and gives pupils an assignment to draw any three surveying equipment.
Pupils’ Activity: Pupils listen to the summary and copy the assignment.
Learning Point: The lesson is concluded with a clear summary and follow-up activity.

Lesson Keywords

• Surveying – The process of measuring and mapping land.
• Ranging pole – A pole used to mark lines and positions in surveying.
• Measuring tape – A flexible tape used for measuring distances.
• Peg – A wooden or metal stake used to mark points on the ground.
• Gunter’s chain – A traditional measuring device consisting of connected links.
• Theodolite – A precision instrument for measuring horizontal and vertical angles.

Differentiation

For pupils who grasp concepts quickly, the teacher can ask them to research different types of measuring tapes or the history of surveying equipment. For those who need more support, the teacher will provide additional visual aids and simplified explanations, focusing on identifying the equipment and their basic uses.

Note for teachers using this lesson plan

Teachers should ideally bring actual surveying equipment to the classroom for practical demonstration. If not available, clear pictures or videos should be used. Emphasize safety when handling any equipment. Encourage pupils to participate actively and share any experiences they have with land measurement.