Fun at Class Party!

Given: A picture of Class 3 children preparing for a celebration.

Activities shown in the picture include:
- A child (Shelly) measuring the height of the door using paper strings.
- Children measuring the length of a table using hand spans.
- Children comparing the lengths of their ponytails.
- Children using footsteps to measure distance between walls.
- Children using paper strings of different lengths for decoration.

These activities show measurement using informal tools such as hand spans, footsteps, and paper strings.

Given: Shelly wants to find the height of the door.

Method used:
Shelly uses paper strings to measure the height of the door. She places paper strings end to end along the height of the door and counts how many paper strings are needed to cover the full height.

This is an example of measuring length using an informal (non-standard) unit — the paper string.

Answer: Shelly finds the height of the door by counting how many paper strings, placed end to end, equal the height of the door.

Given: Leena and Adi both measure the length of the same table using their hand spans.

Concept: A hand span is an informal (non-standard) unit of measurement. Different people have different hand span sizes.

Answer: No, they will NOT get the same measurement. Leena's hand span and Adi's hand span are likely to be of different sizes. So the number of hand spans each of them counts will be different for the same table.

This shows why standard units of measurement (like centimetres and metres) are important — they give the same result for everyone.

Given: A picture showing children with ponytails of different lengths.

Method: Compare the lengths of all the ponytails visually by looking at which one hangs the lowest or appears the longest.

Answer: Circle the child whose ponytail appears to be the longest among all the children shown in the picture. (Since the image is not visible, identify the child whose ponytail reaches the furthest down compared to the others.)

Given: Paper strings of different lengths are shown in the classroom picture.

Method:
Step 1: Observe the height of the window in the picture.
Step 2: Compare each paper string's length with the height of the window.
Step 3: Tick (⚡) only those paper strings whose length appears equal to the height of the window.

Answer: Tick the paper string(s) that, when placed next to the window, match its height exactly. (Identify from the picture by visual comparison.)

Given: We need to find the distance between two walls of the classroom.

Method 1 (Footsteps): Walk from one wall to the other in a straight line and count the number of footsteps.

Method 2 (Paper strings): Lay paper strings end to end from one wall to the other and count how many are needed.

Method 3 (Metre rope): Use a one-metre rope and count how many times it fits between the two walls.

Method 4 (Hand spans): Use hand spans placed end to end along the floor.

Answer: Yes, there can be many other ways of measuring the distance. Using a metre tape or ruler gives the most accurate and standard measurement. Footsteps and hand spans are informal methods and may give different results for different people.

Given: A picture showing children measuring in different ways.

Ways of measuring length shown in the picture:
1. Hand spans — spreading the hand and counting how many hand spans fit.
2. Footsteps — walking and counting steps.
3. Paper strings — using strings of a fixed length as a unit.
4. Comparing directly — placing objects side by side.

Best way: Using a standard unit such as a metre rope or a ruler is the best way because:
- It gives the same result for everyone.
- It does not depend on the size of a person's hand or foot.
- It can be used anywhere and by anyone.

Answer: Among informal methods, paper strings are better than hand spans or footsteps because a string of fixed length gives a consistent unit. However, the best method is to use a standard measuring tool like a metre tape or ruler.

Given: Paper strings of different colours and lengths are shown on the board.

Method to identify the shortest string:
Step 1: Look at all the paper strings carefully.
Step 2: Compare their lengths visually — the string that ends the earliest (is the least long) is the shortest.
Step 3: You can also place them side by side starting from the same point to compare.

Answer: Colour the shortest paper string red. The shortest string is the one that is smaller in length than all the other strings when compared side by side.

Given: Paper strings of different colours and lengths are shown on the board.

Method to identify the longest string:
Step 1: Look at all the paper strings carefully.
Step 2: Compare their lengths — the string that extends the furthest is the longest.
Step 3: Place them side by side from the same starting point to confirm.

Answer: Colour the longest paper string green. The longest string is the one that is greater in length than all the other strings when compared side by side.

Given: Some paper strings are already placed on the border of the green board. We need to find how many more are needed.

Method:
Step 1: Count the total number of paper strings needed to go all the way around the border of the board.
Step 2: Count the number of paper strings already placed.
Step 3: Subtract: More strings needed = Total needed − Already placed.

Answer: Count the strings already on the board from the picture and subtract from the total required to cover the full border. Write the answer based on your observation of the picture.

Given: A unit string (of a specific length) is shown. We need to find how many such strings are needed to go around the entire border of the board.

Method:
Step 1: Measure the total length of the border of the board using the unit string.
Step 2: Count how many times the unit string fits along the top, bottom, and two sides of the board.
Step 3: Add all the counts together.

Answer: The total number of unit strings needed = number that fit along the top + bottom + left side + right side of the board. (Count from the picture and write the total.)

Given: A line is drawn in the book.

Steps:
Step 1: Look at the line drawn in the book carefully.
Step 2: Take a piece of wool or cotton thread.
Step 3: Place the thread along the line starting from one end.
Step 4: Mark the point where the line ends on the thread.
Step 5: Cut the thread at that mark.
Step 6: Paste the cut thread exactly along the line in the book.

Answer: The pasted thread should be exactly as long as the line shown — neither longer nor shorter.

Given: A string (line) of a certain length is shown in the picture.

Steps:
Step 1: Observe the length of the given string carefully.
Step 2: Draw a new line/string that starts from a point and extends beyond the length of the given string.

Answer: Draw a line that is visibly longer than the given string. Make sure your drawn string extends further than the end of the given string.

Given: A decoration string held by Shelly and Adi is shown in the picture.

Steps:
Step 1: Observe the length of the decoration string in the picture.
Step 2: Draw a new string/line that is clearly shorter — it should end before the decoration string ends.

Answer: Draw a line that is visibly shorter than the decoration string shown. Your drawn string should not reach as far as the given string.

Given: Half of a moustache is drawn on a face.

Concept: A moustache is symmetrical — both halves are mirror images of each other.

Steps:
Step 1: Look at the half moustache that is already drawn.
Step 2: Imagine a vertical line in the middle of the face (line of symmetry).
Step 3: Draw the other half on the opposite side so that it is a mirror image of the given half — same shape, same curve, same size.

Answer: The completed moustache should look the same on both sides of the face, making it symmetrical.

Given: Several string lights of different lengths are shown.

Method:
Step 1: Look at all the string lights carefully.
Step 2: Compare their lengths — either visually or by imagining placing them side by side from the same starting point.
Step 3: The string light that extends the furthest is the longest.

Answer: The longest string light is the one that is greater in length than all the others. You can find this by comparing them visually — the one that hangs the lowest or stretches the furthest is the longest. Adi should choose that string light.

Given: A large table needs to be moved through a door. The table is too heavy to lift.

Method (Indirect Measurement):
Step 1: Measure the width of the door using a rope, string, or paper strip — mark the width on the rope.
Step 2: Now use the same rope to measure the width of the table.
Step 3: Compare the two measurements.

If the width of the table is less than the width of the door → the table can go through the door.
If the width of the table is more than the width of the door → the table cannot go through the door.

Answer: Without lifting the table, Shelly and Adi can use a rope or string to measure the width of the door and then compare it with the width of the table. This way they can find out if the table will fit through the door.