Classifying Quadrilaterals

Students build and refine decision trees to classify objects efficiently with yes/no questions, then apply the thinking to quadrilaterals — grouping by properties and, in CODAP, repeatedly selecting the variables that best divide the data.

Data and Resources

Additional Info

Field Value
Subject Area Mathematics
Grade Band 6-8
Technology Tool CODAP
Class Time Estimate 3
Data Science Focus
  • 6-8.C.2.3a Employ complex graphs (e.g., bar graphs, line graphs) and basic statistical concepts (e.g., mean, median, mode) to describe patterns and identify trends, similarities, and differences within data.
  • 6-8.C.2.3b Create scatterplots and add line of best fit.
  • 6-8.C.5.2a Identify relationships between variables and represent them using tables, graphs, or diagrams (e.g., decision trees, flowcharts).
  • 6-8.C.5.2b Use simple mathematical or computational models (e.g., statistical summaries, spreadsheet formulas) to describe patterns and relationships in data.
  • 6-8.C.5.2c Test and refine models by comparing predictions to actual data values.
Standards Alignment
  • 6.G.A.1
  • 7.G.A.1
Prerequisites Recognizing quadrilaterals; identifying parallel/congruent sides, right angles; geometric vocabulary.
Version 1.0
Date Created July 8, 2026
Last Updated July 8, 2026