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Design Experiments in Educational Research
In this article, the authors first indicate the range of purposes and the variety of settings in which design experiments have been conducted and then delineate five crosscutting features thatExpand
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Splitting, covariation, and their role in the development of exponential functions
Exponential and logarithmic functions are typically presented as formulas with which students learn to associate the rules for exponents/logarithms, a particular algebraic form, and routineExpand
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Learning to Listen: A Student’s Understanding of Powers of Ten
ion (Piaget, 1971). These intellectual processes are, for the constructivist, the source and the content of knowledge. Knowledge is not the accumulation of information; it is the construction ofExpand
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Comparing and Contrasting the National Research Council Report On Evaluating Curricular Effectiveness With the What Works Clearinghouse Approach
This article summarizes the findings of the National Research Council (NRC) report On Evaluating Curricular Effectiveness and examines the reviews in middle grades mathematics undertaken by the WhatExpand
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Learning Trajectory Based Instruction
In this article, we propose a theoretical connection between research on learning and research on teaching through recent research on students’ learning trajectories (LTs). We define learningExpand
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