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MCI - Worchester State University Singapore Math Institute Classroom Session A3

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CLASSROOM SESSION A3 Whole Numbers Multiplication & Division Slides are available at www.banhar.blogspot.com and Marshall Cavendish Institute’s Facebook Princess Elizabeth Primary School, Singapore
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Page 1: MCI - Worchester State University Singapore Math Institute Classroom Session A3

CLASSROOM SESSION A3

Whole Numbers Multiplication & Division

Slides are available at www.banhar.blogspot.com

and Marshall Cavendish Institute’s Facebook

Princess Elizabeth Primary School, Singapore

Page 2: MCI - Worchester State University Singapore Math Institute Classroom Session A3

This session took on a Forum format participants decide what they want to learnthrough the questions they asked.

Three key activities were used to seed the discussion.

One was to count rows of (many) dots.

Another was to share a number of paper clips quickly. Some groups had a smallnumber, others had a large number of paper clips.

A third was a conversation between two students in Grade 5.

The discussion led to• Knowing that the focus of teaching is different in small number and large number

multiplication and division• A deeper understanding of Spiral Approach and CPA Approach• How teacher can help students learn multiplication and division

Page 3: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Activity

Page 4: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Desde los primeros años, los estudiantes

aprenden a hacer conjuntos o grupos iguales

utilizando materiales concretos.

From the early grades, students learn to make equalgroups using concrete materials.

Page 5: MCI - Worchester State University Singapore Math Institute Classroom Session A3

CPA Approach

Page 6: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Luego, representan estas situaciones

concretas utilizando, en primer lugar, los

dibujos y, …

After that they represent these concretesituations using, first, drawings ..

Page 7: MCI - Worchester State University Singapore Math Institute Classroom Session A3

… más tarde, diagramas (modelos de

barras). Después de eso, escriben

multiplicaciones. Por supuesto, los

profesores volverán a las representaciones

concretas y pictóricas una y otra vez en

aprendizajes posteriores.

… and, later, diagrams. After that they writemultiplication sentences.

Page 8: MCI - Worchester State University Singapore Math Institute Classroom Session A3

CPA ApproachTransition is Important

Page 9: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Escuela No.1577 Teniente Dagoberto Godoy, Santiago, Chile

Singapore Math in

Chile

An example ofhow studentsuse paper clipsto make thetransition fromequal groups tobar model,

Page 10: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Spiral Approach

Page 11: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Multiplication involving whole numbers is

taught over five years, starting in Primary 1.

The focus is on one of the meanings of

multiplication – equal sets or equal groups.

La multiplicación con números enteros se

imparte en cinco años, a partir de 1º básico.

La atención se centra en uno de los

significados de la multiplicación; conjuntos

iguales o grupos iguales. Los estudiantes

aprenden a representar 3 platos de frutas

como de 3 x 6, cuando hay 6 frutas en cada

plato. No se espera que recuerden las tablas

de multiplicar.

Page 12: MCI - Worchester State University Singapore Math Institute Classroom Session A3

conjuntos iguales o grupos iguales

Page 13: MCI - Worchester State University Singapore Math Institute Classroom Session A3
Page 14: MCI - Worchester State University Singapore Math Institute Classroom Session A3

There is a progression from equal groups to

skip-counting.

Hay una progresión de los grupos de igualespara saltar de conteo.

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

Page 15: MCI - Worchester State University Singapore Math Institute Classroom Session A3

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

Page 16: MCI - Worchester State University Singapore Math Institute Classroom Session A3

In Primary 2, students learn multiplication

facts of 2, 5, 10, and 3 and 4. In Primary 3,

they learn the multiplication facts of 6, 7, 8

and 9.En 2º básico, los

alumnos aprenden

las tablas de

multiplicación del

2, 3, 4, 5 y 10. En

básico, aprenden

las tablas de

multiplicación, de6, 7, 8 y 9.

Page 17: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Later, the array meaning

of multiplication is

introduced.

Más tarde, se introduce el

significado del producto

vectorial.

Page 18: MCI - Worchester State University Singapore Math Institute Classroom Session A3
Page 19: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Catholic High School (Primary), Singapore

Page 20: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Da Qiao Primary School, Singapore

Page 21: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Students apply their

understanding of

multiplication to

solve word problems

including those that

include multiplicative

comparison, and at

the same

time, deepen their

understanding of

multiplication.

Los estudiantes

aplican sus

conocimientos de la

multiplicación para

resolver problemas

que incluyen la

comparación

multiplicativa, y al

mismo

tiempo, profundizan

su comprensión de la

multiplicación.

Page 22: MCI - Worchester State University Singapore Math Institute Classroom Session A3
Page 23: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Multiplication is also

applied to find the area

of rectangles and

square when Primary 3

students learn theconcept of area.La multiplicación se

aplica también para

encontrar el área de

rectángulos y cuadrados

cuando los estudiantes

de 3º básico aprenden

el concepto de

área, contando

unidades cuadradas al

final de 3º básico.

Page 24: MCI - Worchester State University Singapore Math Institute Classroom Session A3

In Grade 3 they

learn

multiplication of

2-digit with 1-

digit numbers as

well as

multiplication of

3-digit and 1-digit

numbers.

Después de completar las

tablas de multiplicar, los

estudiantes aprenden

multiplicaciones que van

más allá de la tabla de

multiplicar. Ellos aprenden a

multiplicar números de dos

dígitos con números de 1

dígito, así como la

multiplicación de números

de tres dígitos y números de

un dígito.

Page 25: MCI - Worchester State University Singapore Math Institute Classroom Session A3

In Primary 4, the learn

multiplication of 4-digit

and 1-digit numbers as

well as multiplication of 3-

digit and 2-digit numbers.

The focus is on partial

products.En 4º básico, aprenden a multiplicar números

de cuatro dígitos y un dígito, así como

multiplicar números de tres dígitos y dos

dígitos. La atención se centra en productos

parciales.

42

34

4

Page 26: MCI - Worchester State University Singapore Math Institute Classroom Session A3

National Institute of Education, Singapore

Page 27: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Finally in Primary

5, students learn to use

calculator to multiply

larger numbers.Por último, en 5º básico los estudiantes

aprenden a utilizar la calculadora para

multiplicar grandes cantidades.

Page 28: MCI - Worchester State University Singapore Math Institute Classroom Session A3

The combination situationis not usually used tolearn multiplication inelementary school. In thiscase the teacher hasdecided to extend thelearning of a high-achieving class.

Page 29: MCI - Worchester State University Singapore Math Institute Classroom Session A3

4 x 6 = 24

8 x 6 = ….

Aquí se muestra la estrategia de duplicidad.

Page 30: MCI - Worchester State University Singapore Math Institute Classroom Session A3

A continuación se muestran las

estrategias de adición.

Page 31: MCI - Worchester State University Singapore Math Institute Classroom Session A3

A continuación se muestran las

estrategias de sustracción.

Page 32: MCI - Worchester State University Singapore Math Institute Classroom Session A3

The sharing and grouping meaning of

division are introduced in Grade 1 and are

used in the learning of division of other

number types.El significado de

compartir y reagrupar

de la división se

introduce en 1º básico

y se utilizan en el

aprendizaje de la

división de otras

clases de números.

Page 33: MCI - Worchester State University Singapore Math Institute Classroom Session A3
Page 34: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Singapore Math in

Indonesia

Bina Bangsa School, Bandung, Indonesia

Page 35: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Overheard in a Primary 5 class (Singlish)

Ah Beng: Eh! Why last time in P3, teacher said 14 ÷ 4 is 3 remainder 2? Now this teacher say 14 ÷ 4 is 3.5?

Ah Seng: Because we bigger what! Small that time division is different. Now different.

Overheard in a Primary 5 class (translated, for your benefit, into Standard English)

Ah Beng: Hey! Why was it that when we were in P3, the teacher told us 14 ÷ 4 is 3 remainder 2? Now, this teacher says 14 ÷ 4 is 3.5?

Ah Seng: That is because we are older. Silly! Division was different when we were little. It is different now.

Explain to your colleague why 14 ÷ 4 = 3 remainder 2, and, at some point, 14 ÷ 4 = 3.5 .

Page 36: MCI - Worchester State University Singapore Math Institute Classroom Session A3

choice ofmaterials

Page 37: MCI - Worchester State University Singapore Math Institute Classroom Session A3
Page 39: MCI - Worchester State University Singapore Math Institute Classroom Session A3

Pedagogical Principles of Singapore Method

Spiral Approach

10 : 5 = 2

12 : 5 = 2

remainder 2

Page 40: MCI - Worchester State University Singapore Math Institute Classroom Session A3

En 1º básico no se utiliza el símbolo ÷ o :

para la división. El símbolo se introduce en 2º

básico. La idea de resto se introduce en 3º

básico.

.

In Grade 1, the symbol ÷ or : is not used. The

symbol is introduced in Grade 2. The idea of

remainder is introduced in Grade 3.

Page 41: MCI - Worchester State University Singapore Math Institute Classroom Session A3

“Un plan de estudios de la manera que se

desarrolla debe revisar estas ideas básicas

en varias ocasiones, construyéndose sobre

ellos hasta que el estudiante ha comprendido

todo el aparato formal que conllevan”.

(Bruner 1960 en El Proceso de la

Educación).

.

“A curriculum as it develops should revisit this

basic ideas repeatedly, building upon them

until the student has grasped the full formal

apparatus that goes with them.” (Bruner 1960

in The Process of Education).

Page 42: MCI - Worchester State University Singapore Math Institute Classroom Session A3

En los cursos de 1º a 4º básico, se utilizan

cantidades discretas, por ejemplo piedrecillas

y los niños. En 5º básico se utilizan

cantidades continuas como las medidas

estándar de 13 kg y 13 cm.

In Grades 1 to 4, quantities used are discrete

ones e.g. pebbles and children. In Grade

5, continuous quantities like standard

measures 13 kg and 13 cm are used.

Page 43: MCI - Worchester State University Singapore Math Institute Classroom Session A3

ActivityFind a quick way to share thegiven number of paper clipsamong the members of yourgroup.

Page 44: MCI - Worchester State University Singapore Math Institute Classroom Session A3

La idea de reagrupar antes de dividirse se

introduce al finalizar 3º básico y también se

enseña en 4 º básico.

.

The idea of

regrouping

before

dividing is

introduced

later in Grade

3 and is

taught in

Grade 4 as

well.

Keys Grade School, Manila, The Philippines


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