Kebijakan Pembelajaran Jarak Jauh yang diterapkan selama masa pandemi merupakan upaya paling baik yang dipilih oleh pemerintah dalam meminimalisir tingkat penularan Covid-19 di sekolah. Penelitian ini bertujuan untuk melihat bagaimana respons guru terhadap kebijakan pembelajaran jarak jauh selama pandemi di Provinsi Jambi. Metode penelitiannya adalah metode penelitian deskriptif dengan pendekatan kuantitatif, sumber datanya berupa kuisioner yang diberikan kepada 245 responden guru sekolah dasar (SD/MI dan SMP/MTs) mitra Tanoto Foundation di 7 Kabupaten di Provinsi Jambi. Hasil penelitian menunjukkan bahwa 100% responden guru menyatakan telah melaksanakan proses pembelajaran jarak jauh, metode pembelajaran yang paling banyak digunakan adalah dengan memberikan tugas berupa soal kepada siswa dengan responden sebesar 80% atau sebanyak 195 orang, 30% atau sebanyak 52 orang menyatakan tidak melakukan perubahan kurikulum dalam pelaksanaan PJJ, 81% atau 176 orang menyatakan bentuk dukungan guru kepada orangtua adalah dengan memberikan informasi sumber belajar kepada orangtua untuk disampaikan ke murid, sarana komunikasi paling banyak yang digunakan adalah 65% atau sebanyak 160 orang menyatakan dengan media sosial dalam bentul WA grup, google hangout, facebook dan messenger.
Concrete needs to use alternative materials to reduce cement content to limit the effect of carbon emissions. Marble dust as a waste of the marble industry has very fine grains. X-Ray Fluorescence (X-RF) method was conducted to determine the mineral properties of marble dust. Marble dust was found to contain 98.62% Calcium Oxide (CaO), 0.17% Sulfur Trioxide (SO3) and some elements in small levels. To determine the impact of marble dust on the mechanical characteristics of concrete, an experimental study was conducted. Test specimens were made with four different levels of marble dust, namely 0%, 5%, 10%, and 15%. The experimental results showed that the optimum usage was 6.62% by weight of cement which gave the advantage of increasing the compressive strength of concrete by 11.77%.
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