The importance of alignable differences in teaching linear measurement

@inproceedings{Kwon2011TheIO,
  title={The importance of alignable differences in teaching linear measurement},
  author={Mee-Kyoung Kwon and Susan C. Levine and Kristin Ratliff and Camille Snyder},
  booktitle={CogSci},
  year={2011}
}
We examined understanding of linear measurement in 1st and 2nd graders from high-and low-SES families. Children made two kinds of errors on measuring objects not aligned with the beginning of the ruler reading off the number that corresponded to the rightmost edge of the object (common in low SES children) and counting the number of hatch marks that the length of the ruler encompasses (common in high SES children). Experiment 1 showed that only children who counted hatch marks at pretest… CONTINUE READING

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