<![CDATA[This research aimed to analyze (1) instructional design; (2) teaching learning process; (3) improvement of studentsââ¬â¢ achievement. This research was done at class X SMA Negeri 1 Kedondong.The conclusions of the research are (1) instructional design was arranged based on guided inquiry which consisted five steps; formulating problems, formulating hypothesis, collecting data, testing hypothesis, and formulating conclusion; (2) guided inquiry could improve teacherââ¬â¢s activity in pre-activity, whilst activity and post-activity; (3) guided inquiry could improve studentsââ¬â¢ achievement; cognitive score in cycle I got 58,65 (failed), cycle II got 68,45 (passed), and cycle III got 75,36 (passed), the affective score in cycle I was categorized fair enough, cycle II and III were categorized good, psychomotor score in cycle I got 64,93 (failed), cycle II got 75,55 (passed), and cycle III got 81,76 (passed).Penelitian ini bertujuan untuk menganalisis (1) perencanaan kegiatan pembelajaran; (2) proses pembelajaran; (3) peningkatan hasil belajar. Penelitian ini dilakukan di kelas X SMA Negeri 1 Kedondong. Kesimpulan dari penelitian ini adalah: (1) desain pembelajaran inkuiri terbimbing disusun dengan sintak merumuskan masalah, merumuskan hipotesis, mengumpulkan data, menguji hipotesis, dan merumuskan kesimpulan; (2) inkuiri terbimbing mampu meningkatkan aktivitas guru dalam persiapan, pelaksanaan, dan menutup pembelajaran; (3) pembelajaran inkuiri terbimbing dapat meningkatkan hasil belajar siswa dengan nilai kognitif siswa pada siklus I 58,65 (tidak tuntas), suklus II 68,45 (tuntas), siklus III 75,36 (tuntas), afektif siwa pada siklus I terkategori cukup baik, siklus II baik, siklus III baik, psikomotor siswa pada siklus I 64,93 (tidak tuntas), siklus II 75,55 (tuntas), siklus III 81,76 (tuntas).Kata kunci: hasil belajar, inkuiri terbimbing, keterampilan berpikir kritis]]>
