Data, 7–10 years — 20 topics · MyLeoNes™ Kuks
20 data topics written for 7–10 years — not a older text simplified. In teaching order, each a deck of five cards: the idea, why it exists, a worked example, the common trap and where you meet it.
Data · 7–10 years
Asking a data question
Learn to ask one clear question and collect answers that can be compared fairly.
Tally marks and frequency tables
Turn a collection of answers into totals that are quick to check.
Pictograms and bar charts
Show totals with pictures or bars so differences can be seen at a glance.
Comparing data carefully
Read a chart to find more, fewer, equal amounts and differences without guessing beyond the evidence.
Dot plots
A dot plot puts one dot above each result, so a group of results can be seen on a number line.
The most common result
The mode is the value that appears most often in a set of data.
The mean as fair sharing
The mean tells us what each result would be if the total were shared equally.
The range
The range shows how far apart the smallest and largest values in a data set are.
The median
The median is the middle value when data is put in order.
Line graphs show change
A line graph helps us see how a measured amount changes from one time to the next.
Using data to think about chance
Repeated results can give us an estimate of how likely an event is.
A fair sample
A small, fairly chosen group can give clues about a much larger group.
Categories and measurements
Some data names groups, while other data tells us how much or how many. Knowing the difference helps us record and compare information sensibly.
Two-way tables
A two-way table sorts answers using two questions at the same time. It makes groups and overlaps visible without listing every answer again.
Unusual values
One result can be much bigger or smaller than the others. Spotting it matters because it can change a summary and may also tell us something important about what happened.
Reading graph scales
A graph's scale tells us what the spaces and marks stand for. Reading it carefully prevents small differences from looking huge or large differences from disappearing.
Grouping numbers into intervals
When there are many measurements, putting nearby numbers together can make the pattern easier to see. The groups must be chosen carefully so that the picture does not hide important differences.
Pie charts show parts of a whole
A pie chart divides one whole circle into slices. Each slice represents part of the total, so it can help compare how a collection is divided, as long as the parts really belong to the same whole.
Questions can steer answers
The words in a survey can make one answer sound better, safer or more expected than another. A fair question leaves room for different answers instead of quietly pushing people towards one.
Data can support a claim
A claim is something someone says about what the data show. Good data can support a claim, weaken it or leave the answer uncertain. The important habit is to ask whether the evidence really matches the strength of the statement.
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