The Study of Using Online Game-Baesd Assessment to Improve the Number Sense Ability of Fourth Graders

[[abstract]]This study aims to establish a set of integer number sense ability online test papers for fourth grade students. These test papers could be applied to explore the use of online game-style assessment, integrated into the fourth grade students’ mathematics number sense teaching, so that we can understand the improvement of their number sense, estimation skills and strategies. To achieve the goal of the study, the researchers design "game-playing hamster estimated assessment" as a teaching aid. It based on the integer addition, subtraction, multiplication, division, and four hybrid computing structure designing the eight types of questions and two different versions--the teaching version for teaching, and the evaluation version to assess the estimated capacity of students. Then, using the five dimensions of the number sense defined by Xu Qingyang （2001） as the framework to build number sense test system on line, to view the number sense ability of school children. Basing on the quasi-experimental study “posttest nonequivalent groups design”, the researchers conduct the teaching experiments on 47 selected fourth-grade students which have been divided into experimental group and control group. It used the fourth grade students integer number sense ability online test papers and “game-playing hamster estimated assessment” as evaluation tool. The researchers completed the statistical analysis of the experimental data and got the results as follows: 1. The integer number sense ability online test papers for fourth grade students have appropriate reliability and validity. 2. Online game-playing hamster estimated assessment using on teaching fourth grade students can really enhance the overall number sense skills. 3. Online game-playing hamster estimated assessment using on teaching could improve number sense ability of the fourth grade students who has poor number sense before. 4. Online game-playing hamster estimated assessment using on teaching can really enhance the number sense of fourth grade students in five dimensions including the ability to understand the meaning and relationship of numbers, the ability to compare the size of numbers, the ability to develop computational strategies and determine reasonable answer. 5. Online game-playing hamster estimated assessment using on teaching fourth grade students can really enhance the overall estimated capacity. 6. Online game-playing hamster estimated assessment using on instruction to enhance the estimated capacity of fourth grade students who has poor estimated capacity before. 7. Online game-playing hamster estimated assessment using on teaching fourth grade students can really enhance an integer addition, subtraction, multiplication, division, four mixed computing ability to estimate the theme of the calculation. 8. Online game-playing hamster estimated assessment using on teaching fourth grade students can really improve the estimates calculated questions strategie