Bisma The Journal of Counseling Volume 5 Number 2, 2021, pp 135-141 ISSN: Print 2598-3199 – Online 2598-3210 Undiksha – IKI | DOI: http://dx.doi.org/10.23887/bisma.v5i2 Open Access https://ejournal.undiksha.ac.id/index.php/bisma 135 Development of Resilient Measurement Instruments for High School Students in Denpasar Wilhelmina Olok 1*) , Nyoman Dantes 2 , Ni Ketut Suarni 3 1,2,3 Universitas Pendidikan Ganesha *Corresponding author, e-mail: Sitimutmainah101976@gmail.com Received August 02, 2021; Revised August 31, 2021; Accepted Sept. 20, 2021; Published Online 2021-10-01 Conflict of Interest Disclosures: The authors declare that they have no significant competing financial, professional or personal interests that might have influenced the performance or presentation of the work described in this manuscript. Abstract: The purpose of this development research is to determine the value of the validity and reliability of the tough character instrument. This study was designed with research and development methods. Analysis of the data used in the CVR and CVI tests from Lawshe, the empirical test with the product moment formula, while to test the reliability using Cronbach's alpha. The instrument validation test was carried out by experts. The results of data analysis using the Lawshe CVR test obtained an item value (CVR> 0), then the CVI value was obtained at 0.96, this value means that the content validity index of 45 items in the tough character instrument is very good. The results of the calculation of the validity of the item validity test using the Product Moment formula according to the valid category criteria. this shows that the level of reliability of the tough character instrument is very high, so this tough character instrument product is very important to be developed for students in high school. Keywords: Instrument development, strong character. This is an open access article distributed under the Creative Commons 4.0 Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ©2017 by author How to Cite: Wilhelmina Olok, Nyoman Dantes, Ni Ketut Suarni. 2021. Development of Resilient Measurement Instruments for High School Students in Denpasar. Bisma, 5 (2): pp. 135-141, DOI: http://dx.doi.org/10.23887/bisma.v5i2 Introduction Regulation of the Minister of Education and Culture of the Republic of Indonesia No. 20 of 2018 concerning PPK in Formal Education units, article 2 paragraph 1 explains that: "Strengthening Character Education (PPK) is carried out by applying the values contained in Pancasila. Character education which mainly consists of religious values, honest, tolerant, disciplined, hard working, creative, independent, democratic, curiosity, national spirit, love for the homeland, respect for achievements, commucative, peace- loving, likes to read, cares about the enviroment, cares about social, and is responsible”(Kemendikbud, 2018).