Abstract
This study aims to develop geometry worksheets with the context of upcycling inorganic waste with ecoprint that meet the criteria of validity, practicality, and effectiveness to improve the mathematical proficiency abilities mathematical proficiency skill of mentally retardation students. This study uses the R&D type with the ADDIE (Analyze, Design, Development, Implementation, Evaluation) development model. The subjects in this study were mentally retarded students at one of the special education schools in Berbah sub-district, Sleman Regency, Yogyakarta. The instruments used in this study were validation instruments, student responses, mathematical proficiency tests, and observation and interview guidelines. Based on the validity test, the worksheet contained the good category of mathematical material with an average score of 96 and perfect in terms of media with an average score of 55.5. From these results, the worksheet developed can be stated to meet the validity criteria for teaching material. Meanwhile, regarding student responses, the worksheet contained the perfect category with an average score of 97.66 or the mean the worksheet developed can be stated to meet the criteria of practicality for teaching material. In this study, the effectiveness of the worksheet is known by comparing the average results of the pretest and posttest scores. The mean increase from 41 to 78 means that the worksheet is included in the effective category used to improve the mathematical proficiency of mentally retarded students.
First Page
67
Last Page
80
Recommended Citation
Mersiliana, O.,
&
Andriyani, A.
(2025).
Worksheets Development Context-Based Upcycling Waste and Ecoprint to Improve Mental Retardation Student's Mathematical Proficiency Skills.
Journal of ICSAR, 9(1), 67-80.
DOI: https://doi.org/https://doi.org/10.17977/um005v9i12025p67-80
Available at:
https://citeus.um.ac.id/icsar/vol9/iss1/7