MTS Math 6.6 Addition Strip Board

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MATH DEVELOPMENT ALBUM

6.6 ADDITION STRIP BOARD

MATERIALS:

1. A large wooden board (off white in color) with a row of numerals printed across the top. The numerals 1 to 10 are printed in red, 11 to 18 in blue.

2. A red line divides the board after the 10. The board is scored into squares.

3. Two sets of wooden strips 1 to 9 centimeters in length, 1 centimeter in width. Each strip is numbered 1 to 9 with the numeral on the end of the strip. The red strips are marked into centimeter squares.

4. Addition sheets or booklets, the first set containing problems under 9. The second set would have problems that are over 9.

PREPARATION:

1. Invite the child who has worked with the Decimal System, and materials involving quantity, symbol and sequence.

2. Show the child how to carry the materials to a table.

3. Place the board on the table with the bottom edge at the bottom edge of the table.

4. Strips may be arranged in sequence either above or beside the board (size of table may determine this).

PRESENTATION:

1. Select a problem such as 2+3=. Select the blue strip with the 2 on the end.

2. Place this on the first set of squares beginning on the left side.

3. Obtain the 3 red strip from the stair of strips. Place this at the end of the blue strip covering more squares of the first row.

4. Call the attention of the child to the position of the strips by stating the problem by pointing to the strip and numeral on it and say, "2+3=".

5. Point to the number which appears above the end of the second strip. This is the answer. Now state, "2+3=5". Point out each part as you say it.

6. Review the written problem and write down the answer.

7. Return the strips to the stair at the completion of the problem. (Later a child might choose to continue by leaving each problem, and leaving them on the board limits the strips available).

8. Continue with the next problem- allow the child to work with it as soon as he seems to understand the procedure.

CONTROL OF ERROR:

1. The placement of the strips on the board; the blue strip does not have divisions but the red does. The child may see the 2 on the blue and count the sections of the red to add them to the blue.

2. Verification by the Directress.

3. Use of the second addition chart (confrontation chart).

POINTS OF INTEREST:

1. Seeing the red and blue stair built.

2. The numbers on each strip.

3. The board with the squares dividing it.

4. The sequence of numbers written on the board.

5. Seeing a problem duplicated on the board with the strip.

6. Writing the answer.

7. Finding the answer above the last strip.

8. Returning the strip to the stair.

9. Seeing the completed equations written down.

10. The order in the material.

PURPOSE OF THE MATERIAL:

1. To provide experience in addition of numerals.

2. To give the child concrete experience in addition.

3. To aid the child in learning addition tables.

4. Practice in combinations of numbers.

5. Preparation for abstract mathematics.

6. Concentration.

AGE:

4.5 to 6 years

VARIATIONS:

1. Give the child equations in another form:

EXERCISE:

1. Select the 9 strip in blue and place it on the board; now take the red 1 and place at the end of the strip. Show the child that the result is 10.

2. Ask the child, "Would you like to make some more tens?" or ask if he "would like to see how many tens we can make."

3. Place the blue 8 strip in place, add the red 2. Another 10 is made.

4. Continue with all the strips.

5. Call attention to the fact that "9 plus 1 equals 10". Continue through all the strips.

6. Ask the child to name this also.

7. This gives the child added reinforcement of addition. It reinforces the concept of equal and acquaints the child with the properties of numbers.