The Readiness of Natural Science Secondary School Teachers in Distance Learning during the Covid-19 Pandemic - Efendi, Nur; Science Education Study Program, Faculty of Psychology and Educational Sciences, Universitas Muhammadiyah Sidoarjo (Tadris Biologi Fakultas Ilmu Tarbiyah dan Keguruan IAIN SYEKH NURJATI CIREBON, 2020)