Pengembangan Bahan Ajar Dan Penilaian Portofolio Berorientasi Pembelajaran Berbasis Masalah Pada Mata Pelajaran Final Drive Di Kelas Xi Smkn 1 Sumatera Barat '€…€ Padang According to interview, researcher as facilitator at RSBI SMK (Technical and Vocational School) on west Sumatra have found too...