You sit down next to your child, look at the worksheet and spot a wrong answer. The fastest thing is to say, "That should be 85." It is also the thing that teaches the least.
Checking math homework well is less about finding wrong answers and more about finding where the thinking slipped. Here is a 10-minute routine that works for most kids from early elementary through middle school, plus scripts you can borrow.
The 10-minute routine
Keep it short and predictable. Kids relax when they know what is coming.
- Minute 0 to 2: Let them walk you through one problem they got right. Starting with a win lowers the stakes.
- Minute 2 to 5: Scan for wrong answers. Don't comment yet. Just mark which ones need a second look, lightly, in pencil.
- Minute 5 to 8: Pick one or two and find the first wrong step. Not every mistake, just the first place things went off track.
- Minute 8 to 10: Ask one question, then stop. Let your child fix it. If they can't yet, note it and move on.
That's it. You are not re-teaching the whole unit at the kitchen table.
Find the first wrong step
A wrong final answer can come from many places. The useful question is: where did it start going wrong?
Example 1: Carrying in addition. Your child writes:
47 + 38 = 75
Look at the ones place. 7 + 8 = 15. Your child wrote the 5 but forgot to carry the 1 into the tens. The tens should be 4 + 3 + 1 = 8, so the answer is 85.
Another child might write 715 for the same problem. They added 7 + 8 = 15, wrote the whole 15, then added 4 + 3 = 7 in front. Same missing idea, different-looking mistake: the extra ten never moved into the tens column.
Example 2: Subtracting with regrouping. Your child writes:
52 − 27 = 35
In the ones place, 2 − 7 doesn't work without regrouping, so your child flipped it to 7 − 2 = 5. The correct path is to regroup one ten: 12 − 7 = 5, then 4 − 2 = 2, which gives 25. A quick check: 25 + 27 = 52.
Example 3: Adding fractions with different denominators. Your child writes:
1/2 + 1/3 = 2/5
They added the tops and added the bottoms. The first wrong step is right at the start: halves and thirds are different-sized pieces, so you need a common denominator. 1/2 = 3/6 and 1/3 = 2/6, so the sum is 5/6.
Once you see the first wrong step, you usually know exactly what to ask.
Ask one question instead of giving the fix
When you tell a child the answer, they get one problem right. When you ask a good question, they get a chance to find the idea themselves, and that idea carries over to the next problem.
Good questions point at the step, not the answer. Some to borrow:
- For 47 + 38 = 75: "What did you get when you added 7 and 8? Where did all of that go?"
- For 52 − 27 = 35: "Can you take 7 away from 2? What could you do to get more ones?"
- For 1/2 + 1/3 = 2/5: "Is 2/5 bigger or smaller than 1/2? Does that make sense if you added something to 1/2?"
That last one is worth remembering. 2/5 is less than 1/2, so it can't be what you get by adding a positive amount to 1/2. A quick "does this make sense?" check catches a lot of mistakes.
General scripts that work for almost any problem:
- "Walk me through what you did here."
- "Which step are you least sure about?"
- "Can you check this one another way?"
- "Show me how you'd do an easier version of this."
Then wait. A few seconds of silence feels long, but it is where the thinking happens.
Ask about the step, not the answer. One good question beats three corrections.
Note patterns, not scores
Twelve out of fifteen tells you very little. Which three were wrong tells you a lot.
After a few homework sessions, look for repeats:
- Is it always the problems that need carrying or regrouping?
- Does your child set up fraction problems correctly but slip on the arithmetic?
- Are mistakes clustered at the end of the page, which can mean tiredness rather than confusion?
- Are word problems the trouble spot, while plain calculations are fine?
Jot down what you notice in a few words: "forgets to carry," "adds denominators," "rushes the last row." After two weeks you will have a clearer picture than any score could give you, and something specific to mention to the teacher if needed.
Know when to stop
Some nights, homework turns into a standoff. A few signs it's time to put the pencil down:
- Your child is in tears or shutting down.
- You notice your own voice getting tighter.
- The same mistake has come up three times in a row and the explanation isn't landing.
- It's past the point where your child can focus.
Try saying: "We've done good work. Let's stop here. I'll write a note to your teacher that this part was tricky." Teachers generally want to know where a child is stuck. A worksheet with honest mistakes tells them more than one you quietly fixed.
A tool can help, but you stay in charge
If you check homework often, a homework checker for parents can save time on the scanning part. KudosNest is one we are building: you photograph your child's math page, AI marks each problem, explains the step where the work went wrong and flags anything it isn't sure about. AI can make mistakes, so you look over the result and can correct it. When your child is stuck, the app's kangaroo mascot, Roo, offers hints as leading questions only, at most three per problem, and never the answer. It's on a waitlist for now.
Whether you use an app or a pencil, the routine stays the same: find the first wrong step, ask one question, watch the patterns and know when to call it a night.
