Rekonstruksi LKPD untuk meningkatkan keterlibatan dan penguasaan konsep peserta didik pada materi sistem ekskresi

This research was aimed at investigating the information about use of Student Worksheet (LKPD) results reconstruction involvement and mastery students' concepts in material human excretion system. Reconstruction student worksheets done because previous shows analysis component diagram vee eksperiment students worksheet is low. Whereas, Vee's rubric usually used for developing worksheet. a descriptive research. The subject are 28 grade XI IPA senior high school Bandung. instrument that existence, observation engagement test mastering concept consist multiple choice. result : (1) class 79,17%; (2) based on categories good, 96.43% achieve maximum completeness criteria (KKM), an average N-gain 0.72. showed influence concepts.