Class 3 · CBSE AI · Strand C — Algorithms are Recipes
What is a loop? Repeating steps in algorithms — for kids
A loop repeats steps until a job is done. How computers avoid writing the same thing over and over. For Class 3.
What this concept actually says
- A repeat step says the action once, then says do it again
- A repeat needs a stopping test — the thing the follower checks each time round
- A counted stop says how many times; a checked stop says until something is true
An analogy your child will recognise
Washing clothes at a dhobi
A dhobi at a laundry washes each piece of clothing using the same steps: wet, scrub, rinse, wring. They repeat those same steps for every piece until the whole pile is done. That's a loop — same actions, repeated, with a clear ending: when the pile is empty.
Kolam/rangoli patterns
Drawing a kolam often means repeating the same small pattern unit around a central point — the same curve, drawn again and again, rotated each time. Loops in algorithms work the same way: one unit of action, repeated until the design is complete.
Common misconceptions to watch for
- Loops are only useful for big, complicated tasks — small tasks don't need them
- A loop will automatically know when to stop, so you don't need to write a stopping condition
Key facts in one breath
- A repeat step replaces two hundred identical lines with two lines
- A repeat with no stopping test never ends
- The stopping test must be something the follower can check — 'until the tray is full', not 'until it looks like enough'
- A counted stop fits a fixed number of times; a checked stop fits a job whose size changes every day
How Dhee Learning teaches this — the 3-stage question loop
Every Dhee Learning session for this concept follows three stages. We share the questions Dhee actually asks, so you can hear what a session sounds like.
Stage 1 — Surface
Your tray card says: lay one papad with a gap, then do it again, until the tray is full. Which part is the repeat step, and which part is the stopping test?
Rote answer
"The repeat step is 'do it again' and the stop is at the end. Child cannot say what the follower checks."
Understood
"'Do it again' sends the follower back to lay one more papad, and 'until the tray is full' is the stopping test the follower checks every round before going again."
Stage 2 — Reasoning
A buddy wants your card to say 'do it two hundred times' instead of 'until the tray is full'. Why is that risky on the terrace?
Follow-up Dhee may use: When would 'do it two hundred times' actually be the right stop to write?
Stage 3 — Application
A neighbour must fill water bottles before a trip, and nobody knows how many children will come. What repeat line and what stop go on her card?
Misconception Dhee watches for: Child writes the repeat line but leaves the stop out — redirect: 'Your follower has filled a bottle and gone round again. What does it check to know the job is over?'
Related concepts
Want your child to actually understand this?
Dhee turns this concept into a short spoken lesson — teaching, listening, and probing — so your child builds the idea themselves.
Frequently asked questions
What is loops in instructions — explained for kids? +
A loop repeats steps until a job is done. How computers avoid writing the same thing over and over. For Class 3.
What's the most common mistake children make about this concept? +
Loops are only useful for big, complicated tasks — small tasks don't need them
How does Dhee Learning teach this in a Class 3 session? +
Dhee opens with a question — for example: "Your tray card says: lay one papad with a gap, then do it again, until the tray is full. Which part is the repeat step, and which part is the stopping test?" — listens to your child's answer, then probes the reasoning behind it. The session ends when the child can apply the idea to a brand-new situation, not just recall it.