# Lesson plan: Units of measurement for lenght. Perimeter

Teacher:

School:

Școala Gimnazială Nr.1 Oțelu Roșu

a V-a B

Subject:

Mathematics

Unit:

Measurement units

Title:

Units of measurement for lenght. Perimeter

Type of lesson:

mixed (acquisition of new knowledge; application of theoretical knowledge in practice)

Time:

50 minutes

General skills:

1. Identifying some data, quantities and mathematical relations, in the context in which they appear
2. Processing of mathematical data of quantitative, qualitative, structural type, contained in various information sources
3. Use of specific concepts and algorithms in various mathematical contexts
4. Expression in mathematics-specific language of information, conclusions and solutions for a given situation
5. Analyzing the mathematical characteristics of a given situation
6. Mathematical modeling of a given situation, by integrating acquisitions from different fields

Specific skills:

• Identification of elementary geometric notions and units of measurement in different contexts;
• Use of geometric instruments to measure or build geometric configurations;
• Characterization by description and drawing of a given geometric configuration.
• Determining the perimeters and expressing them in appropriate units of measurement;
• Translating into geometry-specific language some practical problems related to perimeters using the convenient transformation of units of measurement;
• Interpretation by recognizing the elements, their measures and the relationships between them, of a geometric configuration of a given problem;
• Analyzing and interpreting the results obtained by solving practical problems that include elements of studied geometry, with reference to geometric figures and units of measurement studied.

Operational objectives

O1. Observation of segments on physical models / drawings;

O2. Exercises to describe and identify some elements of geometric figures: sides or diagonals;

O3. Exercises for measuring or estimating the lengths of objects in the environment (representing sides of flat geometric figures), by choosing the most appropriate unit of measurement for a given context;

O4. Measurement of lengths on models or objects from the surrounding reality (using appropriate measuring instruments;

O5. Applying practical methods for measuring perimeters on models or objects from the surrounding reality;

O6. Exercises for calculating the perimeter of some geometric figures, intuitively highlighting the perimeter;

O7. Transformation exercises of standard units of measurement for length, using decimal fractions;

O8. Comparison of distances / lengths, perimeters expressed by different units of measurement;

O9. Description of geometric representations in practical / applied situations

O10. Description of the methods used to verify the collinearity of given points, with segment lengths;

O11. Activities highlighting the need for an appropriate standard for carrying out measurements;

O12. Activities that highlight the expression, as a result of a measurement, of the length of segments in standard units (meter with multiples and submultiples thereof) or non-standard units;

Purpose:

Development of practical skills; a better correlation between theoretical notions and problems in everyday life; clear understanding of perimeter problems by identifying geometric figures and bodies in surrounding objects.

Teaching strategy:

1. Methods and procedures: conversation, exposition, explanation, exemplification, knowledge transfer, exercise, problematization, learning by discovery, systematic observation, independent work, didactic game;
2. Forms of organization: frontal, individual;
3. Resources:
1. material: chalk, blackboard, textbook, problem collection, geometry tools, tailoring meter, carpentry meter, roulette, notebooks, evaluation sheet at the end of the class;
1. Timing: 50 ‘
1. human: the collective of the 5th grade B

Expected performance:

• Raising the level of preparation of students and their learning outcomes
• Improving the skills of measurement, calculation, comparison, application of calculation formulas in problems with practical applications.

Evaluation indicators:

-correct identification of geometric figures and bodies, calculation formulas and units of measurement

Methods of monitoring and evaluation:

-solving worksheets for each activity

-creating a portfolio

Evaluation:

• By oral check
• Verbal assessments
• Systematic observation
• Selfassessment
• Solving exercises and problems.

Bibliography:

1. Textbook for the 5th grade, Marius Perianu, Cătălin Stănică, Ștefan Smărăndoiu, Art Publishing House;
2. Noua Mate 2000, Workbook, Sorin Peligrad, Parallel Publishing House 45;
3. The Mathematics curriculum, approved by order of the Minister 3393 / 28.02.2017.

Annexes:

Assessment sheet at the end of the class

Lesson conduct