本研究之主要目的為：探討國小三年級學童角之基本能力和電腦輔助學習對學童學習「角的概念」之影響。而研究方法可包括問卷調查法、半結構訪談、和等組後測設計之準實驗研究法。本研究之研究樣本可分為三類：問卷調查樣本、訪談樣本、和實驗組及對照組。
問卷調查樣本為新竹市大大國小三年級兩班共57位學童，其中包含訪談樣本42位學童，以及實驗組（30位學童）和對照組（27位學童）。
本研究之主要發現：學童對於「角的辨識」不同之迷思概念、學童對於「角的估測」常用之解題策略、學童對於「角的實測」常犯之錯誤類型、學童對於「畫出指定的角」常出現之作圖情形、以及實驗組學童在經過電腦輔助學習後，對於「角的概念」有明顯之助益。

The main purposes of this study include: （1） to investigate grade-3 students ’ fundamental abilities of the concepts of the angle, and （2） to evaluate the effects of utilizing the computer-assisted-learning on teaching the concepts.　The methodology used in the study composes of questionnaire, semi-structured interview, and equal-sample-post-only design of quasi-experimental research.　As a result, we have three kinds of sample： sample for the questionnaire, sample for interview, and the control and treatment groups.　
The sample for the questionnaire consisted of 57 students from two classes, one for control and the other for the treatment, in Hsin-Chu DaDa elementary school, in which 42 were selected to be interviewees.
Our main findings are: the misconceptions of recognizing an angle, the strategies to estimate the degrees of an angle, the error patterns for angle measurement, the characteristics of drawing a given angle, and finally the
computer-assisted-learning can help students having a remarkable progress on learning the concepts.

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