Penelitian ini bertujuan untuk mengetahui peningkatan long term memory dan kemampuan dasar kognitif anak pada kelompok B Taman Kanak-kanak Indra Prasta Kuta serta kendala-kendala yang dihadapi anak dalam pembelajaran. Penelitian ini merupakan penelitian tindakan kelas yang dilaksanakan dalam 2 siklus. Subjek penelitian adalah anak kelompok B (B5) berjumlah 17 anak. Penelitian dilakukan pada semester II (Genap) Tahun Pelajaran 2013-2014. Prosedur penelitian mengikuti prinsip siklus yaitu tahap perencanaan, tahap pelaksanaan, tahap observasi, dan tahap refleksi. Data dikumpulkan dengan metode observasi dan pengolahan data dengan teknik deskriptif kuantitatif. Hasil penelitian menunjukkan bahwa implementasi metode eksperimen berbantuan media konkret pada siklus I dapat meningkatkan (1) long term memory sebesar 41,18% dan (2) Kemampuan dasar kognitif sebesar 52,94%. Pada siklus II (1) long term memory mencapai ketuntasan sebesar 100%. (2) Kemampuan dasar kognitif mencapai ketuntasan 100%.Kata Kunci : Metode Eksperimen, Media Konkret, Long Term Memory, Kemampuan Dasar Kognitif This study aims to investigate the increase in long term memory and basic cognitive ability in group B children of Taman Kanak-kanak Indra Prasta Kuta and obstacles faced by children in learning. This study was an action research conducted in two cycles. Subjects were children in group B (B5) of 17 children. The study was conducted in the second semester (even) in the Academic Year 2013-2014. The research procedure follows circles such as planning phase, implementation phase, observation phase, and reflection phase. The data were collected by using observation and taken by using descriptive quantitative method. The results show that the implementation of the experimental method with concrete media can improve (1) long term memory of 41.18 % and (2) Cognitive basic ability of 52.94% at the end of the second cycle, there is an improvement in (1) long term memory achieving the expected standard of 100 % and (2) Cognitive basic ability achieving the expected standard of 100%.