This research includes research and development (Research and Development). Research and development are research methods used to produce certain products and test the effectiveness of the product. To be able to produce certain products used research nature of needs analysis and to test the effectiveness of the product so can function in the wider community, research is needed to test the product.
Purwono, Wahono Widodo, Zainul Arifin Imam Supardi (2019); Development of Physical Learning Instrument with Process Skills Approach to Train Student’s Critical Thinking Skills On the Concept of Dynamic Electricity; International Journal of Scientific and Research Publications (IJSRP)
9(11) (ISSN: 2250-3153), DOI: http://dx.doi.org/10.29322/IJSRP.9.11.2019.p9557