• Young Children’s Understandings of Length Measurement: Evaluating a Learning Trajectory

    Janka Szilágyi, Douglas H. Clements, and Julie Sarama
    This study investigated the development of length measurement ideas in students from prekindergarten through 2nd grade. The main purpose was to evaluate and elaborate the developmental progression, or levels of thinking, of a hypothesized learning trajectory for length measurement to ensure that the sequence of levels of thinking is consistent with observed behaviors of most young children.