Pteridophyte classification has undergone many changes both from morphology as well as phylogeny aspects. Thus, a variety of learning experiences are required to promote understanding on concepts and managing learning activities--this study aimed at determining the impact of CIRGI and CirGi Unification on students' metacognitive skills. A quasi-experiment was applied with pre-post control group design. The sample used was 70 students of Botany Phanerogam class at Universitas Negeri Jakarta, Indonesia. Data was collected with metacognitive skills, student questionnaire responses to learning, and observation sheet of syntax implementation. The metacognitive test instrument was verified as valid and reliable. One-way ANCOVA was used as data analysis technique. This study's conclusion revealed that there was an influence of CIRC and CirGi unification on the student's metacognitive skills. The influence was higher compared to those using conventional learning models.