I just wrote the fractions in order and spread them out the same.
The child spaces the fraction tick marks by equal gaps instead of by value. They put 1/4 and 1/2 the same distance apart, ignoring that 1/2 is twice as far.
The child treats the fractions like a list of labels, not numbers on a number line. They space them out evenly the way they would write words in a row.
Words rarely shift this one. It needs something to look at — a picture, a fold, an object on the table — before the explanation lands.
One X per group, not per data point
What you might hear
I put one X on every fraction that showed up in the list.
The child stacks one X for each fraction value that appears, instead of one X for every single data point. Three items at 1/4 get only one X.
The child confuses marking 'this value happened' with counting how many times it happened. They check the value off once.
This one is not a slip to correct — the underlying idea needs re-teaching before more practice will help.
Skips fractions that have no data
What you might hear
Nothing was 1/4, so I didn't put it on the line.
The child leaves out fraction values with zero data points. The scale jumps from 1/8 straight to 1/2, dropping the empty 1/4 and 3/8 marks.
The child thinks the line plot only needs the fractions that were measured. They forget the scale must stay evenly spaced.
Words rarely shift this one. It needs something to look at — a picture, a fold, an object on the table — before the explanation lands.
What to say when you see it
For each mistake above, Algo School gives you the words to say next — the specific response that corrects the thinking instead of just marking the answer wrong, plus practice aimed at that exact error.
Fraction length-total set — The plot below displays the paper strips' lengths. Find their total in inches.
Answer18 1/8
Generated by line-plot-5, a deterministic question engine — not written by an AI, and verified before any child sees it.
FAQ
Questions parents ask about this
How do I know which of these mistakes my child is making?
Look at what they SAY, not just what they wrote. Each mistake above includes the phrasing a parent typically hears — that sentence is usually the giveaway. In Algo School, the tutor recognises these patterns while your child is working and adapts the session around the one it sees.
Is "Make a line plot with fractional measurements (grade 5)" something children normally struggle with?
Yes. We track 3 distinct approved mistake patterns for this concept, each one written up because it recurs — not because it is unusual. A child making one of them is doing something systematic, which is far easier to fix than random errors.
What should I do once I know which mistake it is?
Respond to the thinking, not the answer. Algo School gives parents the specific wording for each mistake, then generates practice targeted at that error and shows you whether it actually cleared.
Where do these mistakes come from?
They are part of the same content library that drives practice: each one is reviewed and approved before it is used, and the Measurement and Data questions on this site are checked by an automated verification pass before a child is ever served them.
Related
Other places children go wrong
Where this sits
The year this concept belongs to
See the full curriculum map — every Common Core concept we cover, the
verified question count, and what a child at this level should know.
Find out which one it actually is
Free for 15 days — a card is kept on file, but $0 is charged until
the trial ends. Cancel in one click before then and pay nothing.