📊 Primary Maths & Science Games · Grade 4 · Bar charts and the mean
Charts and the Mean: Read It, Draw It, Level It Out
The usual slips are forgetting what one square stands for, and adding up for the mean without dividing (or dividing by the wrong count). Level the bars out once and the mean makes sense: it is the evened-out value, not necessarily one of the numbers, and it does not mean every value is the same.
- Free, no sign-up
- Ad-free play area
- Tablet friendly
- Parent mode
- A4 worksheet
- 5 levels
How to play
- In Explore, drag bars up or down, set one square to 1, 2 or 5, switch to the pictograph, sort or reset.
- Tick Mean to show the mean line (orange is extra, dashed is missing), then press Level out (pause any time) to make the bars equal while the total stays the same.
- Levels: pictographs, drawing a bar chart from a table, comparing, finding the mean, and using the mean.
Curriculum unit
Primary maths, grade 4: bar charts with a scale, the mean, and reading and comparing charts (PEP textbook, grade 4 volume 1 unit 7 and volume 2 unit 8).
For parents and teachers
Mistakes are grouped as counting pictures only, the scale, most and least, adding instead of subtracting, forgetting to divide, dividing by the wrong count, giving the mean as the missing value, how the mean moves and the average-depth idea. Worksheet questions give the data in words.