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Interpreting simple data displays
Do you have a favorite food? Emma shows what's in her lunch box.
Learning intention
Students will learn how to:
arrange objects in a display to identify groups with greater than/less than/the same as, without needing to count.
Success criteria
I will know I have been successful if I can:
- arrange groups of objects evenly
- find the groups with more than/less than/the same as, without counting.
Prerequisites
- Counting up to 10
- Sorting into groups
Language
Reinforce the use of mathematical language: information, collect, group, display, objects, more, less, same
Misconceptions
- Objects do not need to be aligned with equal spaces to read in a display.
- Objects do not need to be the same size when used in a data display.
- To find which group has more/less/same, objects always need to be counted.
Before the video
- Explore length by showing 2 straws or other objects and ask ‘How can I find out which is longest?’. (Line them up but make sure they all start in the same place.) Line them up and ask which is long/short/longest/shortest? Do the same with 3 lengths.
- Instruct the students to complete the Mathletics activity; Everyday Length.
During the video
First viewing:
Watch the video without stopping or pausing. Then, ask the children to explain what happened in the video. Begin to draw out key vocabulary or possible misconceptions.
Second viewing:
| Pause point | Key learning | Action/discussion |
|---|---|---|
| 1:35 | It is easier to count and compare objects when they are arranged into a display? | Why did Emma line the grapes up? |
| 2:12 | More and less than | Which is more? How do you know? |
| 4:23 | Items must be arranged evenly to compare groups | What has Emma done wrong? Why does it look like Emma has more cheese even though she counted that there were 5 of each? |
| 4:53 | Items must be arranged evenly to compare groups | What is important to do when you organize objects like Emma has? Start all the objects at the same starting point. Arrange each set of objects so that they look the same as the others. |
| 5:53 | The longest line has the most objects | Has Emma arranged her groups correctly? Has she arranged everything evenly? Which color does she have most of? How do you know? |
After the video
Game: Let’s get organized!
- Practice arranging groups of objects into equal spaces as a whole class by passing a tubs of colored cubes around the class and asking each child to pick a cube. Then organize the cubes into colors and line them up with equal spaces. Photograph them. Use the display to answer more than/less than questions.