Hikmah Nurngaeni Pengarang Buntara Adi Purwanto, S.S., M.Pd. Dosen Pembimbing 1 Sahid, S.S., M.A. Ketua Penguji Buntara Adi Purwanto, S.S., M.Pd. Penguji 2 Arif Widyantoro, M.Pd., B.I Penguji 1

This research aims to determine the effectiveness of the suggestopedia method in improving students' English vocabulary at Pacarmulyo 1 Elementary School which is located in Jetis Pacarmulyo Village, Wonosobo Regency. The researcher was given the opportunity by the school principal to visit and observe the school to identify problems related to this research. Researchers used the Suggestopedia method to overcome students' problems in enriching English vocabulary using a classroom action research (CAR) design. This research consists of 2 cycles, each cycle has stages, namely planning, implementation, observation and reflection. The sample taken for this research was class IV at the school. The research instrument has several parts, namely interviews, observations, test results and documentation. The results of observations and tests increased. Observation results, in cycle 1 it was 56% and in cycle 2 it was 84%. Then the test results in the pre-cycle were 34.1%, in cycle 1 it was 56.9% and in cycle 2 it was 79.3%. The results of the interview test also changed, from previous classroom action research, students who did not like English lessons became like English lessons after using this method. From the results obtained by researchers, it can be concluded that using the Suggestopedia method can improve students' ability to enrich their English vocabulary. Keywords: suggestopedia method, IV students, classroom action research, vocabulary enrichment