Learn with Amar
Teaching video
A teaching recording for this chapter has not been published yet. Start with the worked example below and explore the related animations where available.
Grade 1 chapters and video availability01 · Read and understand
What you will learn
- Distinguish an object's position from a group's size.
- Explain your method and check what the result means in the stated situation.
Before you start
Recognizing small groups and saying counting words; an adult may read the prompts aloud.
Keep paper nearby. Read the question once for the context, then again to identify what is known and what you need to find.
Start with a question
From the front, a toy line is bear, duck, fox, dog, cat. Which toy is fourth?
Why this math matters
Use first, second, and third to describe turns in a classroom routine. The worked example shows how to connect the situation, its mathematical representation, and a check on the result.
Set up the model
A useful answer starts with clear assumptions:
- Use the units, grouping rules, and reference whole stated in the question.
- Treat the supplied counts and measurements as exact within the classroom model, unless an estimate or a random outcome is requested.
02 · Work through the example
Follow the reasoning, one step at a time.
Try to predict the next step before reading it. After each calculation, explain why the operation makes sense and how it helps answer the original question.
Work through it with Amar
See this example unfold.
The complete worked example, one idea at a time.
Positions in a line
PausedQuestion: Start with the question. Paused.
Question
Start with the question
From the front, a toy line is bear, duck, fox, dog, cat. Which toy is fourth?
Before you calculate
Read what is known and what you need to find. Make a prediction before moving to the first calculation.
Starts paused. Play advances through the full text at a reading pace; pause whenever you need more time. Previous, Next, and the phase buttons let you set your own pace. Playback pauses when this walkthrough leaves the screen or you switch tabs.
Your device’s reduced-motion setting keeps each phase still. Manual controls remain available. The full written solution stays below.
Represent the situation
1st bear; 2nd duck
Begin at the stated front of the line.
Connect the parts
3rd fox; 4th dog; 5th cat
Give each position its ordinal name.
State and check the result
The dog is fourth
Fourth describes a position; five describes the total number of toys.
The result
The dog is fourth
Fourth describes a position; five describes the total number of toys.
Common mistakes to catch
- State which end begins the count.
- The fourth object does not mean there are only four objects.
03 · Practice independently
Try it before revealing the answer.
Use paper or a calculator as needed. Write your units and reasoning, then open the hint or explanation to check your approach.
Practice 1
Which toy is second from the back of the same line?
Show a hint
Start with the cat at the back.
Reveal answer and explanation
Dog
Cat is first from the back, and dog is second.
Practice 2
A runner is third in a line. How many runners stand before them?
Show a hint
Count the first and second positions.
Reveal answer and explanation
2
Third position has two earlier positions.
Take the idea with you
Use first, second, and third to describe turns in a classroom routine.
04 · Reflect and continue
Can you explain it in your own words?
Before moving on, explain the main idea without looking at the worked example. Try both practice questions, check your reasoning, and name one mistake you now know how to avoid. Return to a step if you still need support.
Up next: See five and some more
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