THE EFFECTIVENESS OF USING 3D BASE-TEN-BLOCKS
IN LEARNING ADDITION AND SUBTRACTION OF WHOLE NUMBERS
WITH AND WITHOUT REGROUPING

This research was conducted to assess the mathematical skills of the Grade 2 pupils of Placer West Central Elementary of Placer II District. This is designed to determine the achievement levels of the pupils in two basic operations; addition and subtraction. The study used experimental method of which data on learning addition and subtraction were gathered through testing. Researcher-made questionnaires served as instruments in this study. Thirty Grade 2 pupils were the participants in this study. Fifteen were chosen to be the control group exposed to regular chalk-talk sessions and 15 for the experimental group who received the intervention using 3D Base-Ten-Blocks. Both groups received the same pre-test. Percentage, Mean and Standard deviation were used to determine the level of performance of the participants. A total of six 50-minute sessions were given to both groups during intervention period. After the post-test, it came out that that control group remained satisfactory while the experimental group improved from unsatisfactory to very satisfactory. ANCOVA which determined that results have significant differences for both Control and Experimental groups. Hence there is enough evidence that 3D Base-Ten-Blocks could improve the mathematics performance of the pupils, thus, highly recommended for use.