1. Improving critical thinking skills through the integration of problem based learning and group investigation. Issue 1 (4th January 2016) Authors: Asyari, Marhamah; Al Muhdhar, Mimien Henie Irawati; Susilo, Herawati; ., Ibrohim Journal: International journal for lesson and learning studies Issue: Volume 5:Issue 1(2016) Page Start: 36 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗