Grade 4 · Data & Probability
One-to-One and Many-to-One Correspondence in Graphs
Grade 4 data work introduces many-to-one correspondence: on a bar graph, one square may represent 5 students rather than 1. This scale change allows large data sets to be displayed compactly. Reading scales is a critical literacy skill: misreading the scale changes every value in the graph. Students also begin to critically examine graphs: a scale that does not start at zero can exaggerate differences, misleading the reader.
LESSON VIDEO
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Lesson video
A short walkthrough to play in class or assign for flipped/at-home viewing.
WHAT STUDENTS WILL LEARN
✓Create and read bar graphs and pictographs using one-to-one correspondence
✓Create and read bar graphs and pictographs using many-to-one correspondence (scale)
✓Choose appropriate scales for a given data set
✓Describe, compare, and interpret data at three levels: direct, comparative, interpretive
✓Critically examine graphs for accuracy and potential misrepresentation
BUILDS ON