XMSS LESSON PLAN TEMPLATE: Using ICT in Teaching and Learning 2010
SUBJECT AREA: Mathematics GRADE LEVEL: Sec 3E
Name of Teachers: Lee Kin Meng
LESSON TITLE: Geometrical Properties of Circle TIME ALLOTTED: 1 hour
LESSON DESCRIPTION: (Write a concise description of what occurs in this lesson.)
1. The students will explore the angle properties of circle.
2. They will be looking at these properties in this lesson:
- angle at centre = 2 angle at circumference.
- angle in a semicircle.
- angles in the same segment.
3. They will learn how these 3 properties apply when the angles are drawn in different orientations.
4. They will learn to isolate angles that comply with these properties in more complex problems.
CLASSROOM LAYOUT AND GROUPING OF STUDENTS:
(Where will the learning take place? How will the room be organized with the computers? How will the students be
grouped (class group, individuals, pairs, small groups, etc…)
The lesson will take place in the computer lab. Students may work individually or in pairs.
INSTRUCTIONAL OBJECTIVES:
(Identification of the specific learning outcomes expected to happen based on Competency Standards.)
a b c d
Creativity & Innovation ■ □ □ □
Communication &
Collaboration □ □ □ □
Research and Fluency
□ □ □ □
Critical Thinking,
Problem Solving and
Decision Making
■ □ □ □
Digital Citizenship
□ ■ □ □
Technology Operations
and Concepts ■ □ □ □

XMSS LESSON PLAN TEMPLATE: Using ICT in Teaching and Learning 2010
Creativity and Innovation :
a) apply existing knowledge to generate new ideas, products or processes
Critical Thinking, Problem Solving and Decision Making :
b) plan and manage activities to develop a solution or complete a project
Digital Citizenship :
b) exhibit a positive attitude toward using technology that supports collaboration, learning and productivity
Technology Operations and Concepts :
a) understand and use technology systems
MATERIALS, RESOURCES AND TECHNOLOGY:
1. Materials and Resources for this Lesson (special devices)
Technology Components for this Lesson
Computers with internet access, and a main host computer that is able to control/manage the screen access
of the other computers used by the students through Junglebyte.
2. Web Site for this Lesson
Ace-learning website (www.ace-learning.com.sg)
3. Computer Software for this Lesson
Ace-learning system
STUDENT’S PRESENT LEVEL OF PERFORMANCE AND KNOWLEDGE:
( Do the students have the adequate knowledge to complete the lesson successfully? What pre-requisite skills must
the students have to complete the lesson content? Include technology skills.)
Students should already know
• what is a chord
• what is a segment/sector
• basic geometry involving parallel and perpendicular lines
• angle properties of polygons
• symmetrical properties of circle (properties of chords)
• how to navigate through the ace-learning system

XMSS LESSON PLAN TEMPLATE: Using ICT in Teaching and Learning 2010
INSTRUCTIONAL PROCEDURES:
1. Motivation:
Explain the importance of the lesson to motivate the student. Relate lesson to previous lesson or real-life
situation.
• Geometrical properties of circle are important and relevant to real-life situations as many
architectural designs are created based on understanding of circle and polygons.
• Angles are always governed by fixed rules and hence easy to understand and apply.
2. Activities: (The sequential activities to happen in this lesson. It describes the teaching method to employ in
learning the lesson.)
• Students first access the ace-learning system.
• Students to go into the topic on Geometrical Properties of Circle, then the subtopic Angle Properties of
Circle. After that, select Property 1, followed by 2 and 3 under Video Lessons.
• Students are to run through these video lessons and understand the concepts delivered.
• Students then explore these properties by using the Angle Properties of Circle under Interactive Lab.
• They will then attempt the 31 questions in the Practice Drill. It is ok if they could not complete on time.
3. Closure:
Summary of the lesson and future lesson.
• After all the above activities are done, teacher will ask the students for answers to arrive at the
following conclusions:
a. Angle at centre is always twice the angle at circumference.
b. When the angle at centre becomes 180 degrees, then the angle at circumference becomes 90 degrees.
This is a special case and is known as angle in a semicircle.
c. If there are two angles at the circumference, they can be related to the angle at centre in the same
way. Hence, these two angles at the circumference are equal, hence, they are known as angles in the
same segment.

XMSS LESSON PLAN TEMPLATE: Using ICT in Teaching and Learning 2010
SUPPLEMENTAL ACTIVITIES:
1. Additional activities to expand the lesson
2. Remediation activities for the student needing more instruction and practices
3. Assignments
Nil
ASSESSMENT AND EVALUATION:
How will you measure the student’s success? Formally or informally? Formal evaluation of student work requires that
a grade is taken while informal might be monitoring of work, or class discussion. This section should contain a
description of the assessment process, the criteria for achievement, and performance levels. The criteria should
directly align to objectives and instruction. Describe your plan for providing feedback to your students.
During the discussion at the last part of the lesson, the teacher can gauge if the students have learnt what they are
supposed to learn. Also, questions from the textbook will be given to them as class or homework to further check
their understanding.

XMSS LESSON PLAN TEMPLATE: Using ICT in Teaching and Learning 2010
STUDENT PRODUCTS:
What artifact(s) or products will result from the lesson? (such as a report, newsletter, diagram, slideshow, drawing,
etc.)
Homework done on graph/foolscap papers.