METODE EXTENDING CONCEPTS THROUGHT LANGUAGE ACTIVITIES (ECOLA) DINA PANGAJARAN MACA PAMAHAMAN BIOGRAFI: Studi Kuasi Ékspérimén ka Siswa Kelas XI-IPA 2 SMA Laboratorium Percontohan UPI Bandung Taun Ajaran 2013/2014 - Susanto, Heri (2014)