Complex sentence: Previous curriculum that was used in SMP Negeri 5 Bandung is KBK or Kurikulum Berbasis Kompetensi (Competency-Based Curriculum), which only used for a couple of years, from the educational year 2004-2005 through 2005-2006.
Split into simpler sentences: Previous curriculum that was used in SMP Negeri 5 Bandung is KBK. The school used KBK or Kurikulum Berbasis Kompetensi (Competency-Based Curriculum) only for a couple of years, from the educational year 2004-2005 through 2005-2006.