The Study of the Spatial Sense of Mathayomsuksa 1 Students at Kasetsart University Laboratory School, Center for Educational Research and Development on “The Relation of Two-Dimensional and Three-Dimensional Geometry Figure” by Using Learning Activity based on the concept of The Van Hiele

Abstract

The purposes of this research were 1) to study the Spatial Sense on “The Relation of TwoDimensional and Three-Dimensional Geometry Figure” based on the concept of The Van Hiele and 2) to study the mathematics learning achievement on “The Relation of Two-Dimensional and Three-Dimensional Geometry Figure” based on the concept of The Van Hiele
The sample was 40 Mathayomsuksa 1 students of Kasetsart University Laboratory School Center for Educational Research and Development
that was selected by purposive sampling. The instruments in data 1) lesson plans on “The Relation of Two-Dimensional and Three-Dimensional
Geometry Figure” based on the concept of The Van Hiele, 2) the spatial sense test on “The Relation of Two-Dimensional and Three-Dimensional Geometry Figure” based on the concept of The Van Hiele, and 3) the learning achievement test on “The Relation of Two-Dimensional and Three-Dimensional Geometry Figure” based on the concept of The Van Hiele. Percentage, mean, standard deviation, and t-test were used for analyzing data. The research findings revealed that the students had 1) the spatial sense on “The Relation of Two - Dimensional and Three - Dimensional Geometry Figure” by using learning activity based on the concept of The Van Hiele higher than 70% and 2) the learning achievement on “The Relation of Two-Dimensional and Three-Dimensional Geometry Figure” by using learning activity based on
the concept of The Van Hiele with the average of students after learning was higher than before learning and higher than Learning Activity 70% at
the .05 level of significance.