Proceedings of the nineteenth annual meeting of the North American chapter of the international group Psychology in Mathematics Education. Geometry and Spatial Reasoning. The Effects of Logo on Children's Conceptualizations of Angle and Polygons. Forming Geometric Concepts. Structure and Insight .
Visual Students identify and reason about geometric configurations based on their appearance.
The unit consists of several two-dimensional geometry tasks that cause students to reflect on their thinking and develop more sophisticated geometric reasoning. The unit includes six explorations on quadrilaterals and six explorations on triangles. There are three additional explorations on triangles in which students combine their geometric reasoning about triangles and quadrilaterals. Part of the fun of the program is that students are able to manipulate the various shapes on the screen. Control points on each of the Shape Makers allow the students to change side lengths, angle measure, and the orientation of a given shape.