Teachers as educators are expected to continuously improve their professional abilities, especially in the field of teaching, including elementary school teachers. However, there are still elementary school teachers who use conventional learning in delivering learning materials to students. As a result, students are less able to develop their cognitive, affective, and psychomotor abilities. One of the lessons that can overcome this is the APOS-based Open ended. Open-Ended is a type of learning in which the teacher provides a problem situation to students whose solutions or answers to these problems can be obtained in various ways. To implement this learning, learning stages are needed. In this case, the Open-Ended learning stage is based on APOS. APOS is a constructivist theory about how students construct concepts through 4 things, namely Actions, Processes, Objects, and Schema. These 4 things are done through the ACE cycle, namely activities, class discussions, and practice questions (Exercises). The results of this community service activity are that it turns out that this activity is able to provide alternative solutions to develop the abilities and dispositions of students at the elementary level through the implementation of APOS-based open ended learning.

Guru sebagai tenaga pendidik diharapkan untuk terus-menerus meningkatkan kemampuan profesionalnya, terutama dalam bidang pengajaran, tidak terkecuali guru SD. Namun masih ada guru   SD   yang   menggunakan   pembelajaran   konvensional   dalam   menyampaikan   materi pembelajaran ke peserta didik. Akibatnya, peserta didik kurang dapat mengembangkan kemampuan kognitif, afektif, dan psikomotoriknya. Salah satu pembelajaran yang dapat mengatasi hal tersebut adalah Open ended berbasis APOS. Open-Ended merupakan jenis pembelajaran di mana guru memberikan suatu situasi masalah kepada peserta didik yang solusi atau jawaban masalah tersebut dapat diperoleh dengan berbagai cara. Untuk mengimplementasikan pembelajaran tersebut, diperlukan tahapan pembelajaran. Dalam hal ini, tahapan pembelajaran Open-Ended berbasiskan APOS. APOS adalah suatu teori konstruktivisme tentang bagaimana peserta didik mengkonstruksi konsep melalui 4 hal, yaitu Aksi (Actions), Proses (Processes), Objek (Objects), dan Skema (Schema). Ke-4 hal tersebut dilakukan melalui siklus ACE, yaitu   aktivitas (Activities), diskusi kelas (Class discussion), dan latihan soal (Exercises).  Adapun hasil  dari  kegiatan pengabdian kepada masyarakat ini adalah ternyata kegiatan ini mampu memberikan solusi alternatif untuk mengembangkan kemampuan dan disposisi peserta didik di tingkat SD melalui implementasi pembelajaran Open ended berbasis APOS.