I. Aims : 1. Knowledge : Help students know the rectangle has 4 sides : there are 2 equally short sides and 2 equally long sides Help students know rectangle has 4 square corners 2. Skill : Students can draw and write the name of rectangles 3. Attitude : Students are interested in learning II. Prepare : 1. Teacher : Powerpoint Rectangles, pictures in studentbook 2. Students : Math studentbook and textbook III. Procedure : 1. Warmup ( 3 mins ) • Play a game “ Square corners counter ” Teacher divided into 2 teams. Each team is given a drawing. The team counts right angles in drawing faster, that team wins Teacher comments and summaries 2. Introduction to rectangles ( 5 mins) • Teacher hold a rectangle then ask students what kind of shape it is, call out its name. • State aims and requirement about the lesson • Write the name of lesson on the board
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RECTANGLE
I Aims :
1 Knowledge :
- Help students know the rectangle has 4 sides : there are 2 equally short
sides and 2 equally long sides
- Help students know rectangle has 4 square corners
2 Skill : Students can draw and write the name of rectangles
3 Attitude : Students are interested in learning
II Prepare :
1 Teacher :
- Powerpoint
- Rectangles, pictures in studentbook
2 Students : Math studentbook and textbook
III Procedure :
1 Warm-up ( 3
mins )
Play a game “ Square corners counter ”
- Teacher divided into 2 teams Each team is given a
drawing
- The team counts right angles in drawing faster, that
team wins
- Teacher comments and summaries
2 Introduction
to rectangles
( 5 mins)
Teacher hold a rectangle then ask students what kind of shape it is, call out its name
State aims and requirement about the lesson
Trang 2 Write the name of lesson on the board
3 New lesson
(10 mins)
Take shape in rectangles
- Require students to check 4 angles by square and show result: Each angle A, B, C, D
Rectangle has 4 right angles
- Require students to measure rectangle’s sides by ruler and show the result: AB = CD,
AC = BD
+ 2 sides AB and CD are long sides + 2 side AC and BD are short sides
A rectangle has 2 long equal sides, 2 short equal sides
- Define “length” and “width” of rectangle:
“The length of long sides is called length, the length of short sides is called width”
- Show the conclusion: A rectangle has 4 right angles, 2 long equal sides, 2 short equal sides
Guide students to learn by heart rectangle’s property
- Hang the conclusion board and require learners speak out loud all together then one by one and learn by heart
3 Practice
(12 mins)
3.1 Exercise 1
Work in pair to choose the rectangles
Trang 3Teacher invite a random group to come up and show the result
3.2 Exercise 2
Measure and state the length of sides of 2 given rectangles (work in books)
Invite 2 students to come up and write the results 3.3 Exercise 3
Ask students to find the ractangles in the image and answer questions: “How many rectangle are there? Call out its names?”
Require students to find the length and width of rectangles in the image write results on notebooks
Invite 3 students come up and write the results on board
3.4 Exercise 4
Ask students to draw one more line segment to create a rectangle into the books
Invite 2 students to come up and work on boars
Ask students if they have other ideas and show the way how to do it
4 Sum-up
( 2 mins )
Ask students to repeat the conclusion: “A rectangle has 4 right angles, 2 long equal sides, 2 short equal sides”
Teacher feedback about the lesson
Require students to prepare the next lesson
Trang 4“Squares”