Penelitian ini merupakan penelitian pengembangan, tujuan dari penelitian ini yaitu
(1) mengetahui prosedur pengembangan lembar kerja peserta didik (LKPD)
berbasis Problem Based Learning materi aljabar untuk memfasilitasi kemampuan
pemahaman konsep peserta didik. (2) mengetahui kevalidan LKPD berbasis
Problem Based Learning materi aljabar untuk memfasilitasi kemampuan
pemahaman konsep peserta didik. (3) mengetahui kepraktisan LKPD berbasis
Problem Based Learning materi aljabar untuk memfasilitasi kemampuan
pemahaman konsep peserta didik. (4) mengetahui keefektifan LKPD berbasis
Problem Based Learning materi aljabar untuk memfasilitasi kemampuan
pemahaman konsep peserta didik. Penelitian ini menggunakan model
pengembangan Plomp yang terdiri dari tiga fase yaitu fase pendahuluan, fase
pengembangan dan fase penilaian. Pada fase pendahuluan dilakukan analisis
masalah, analisis kurikulum, analisis peserta didik dan analisis materi. Berdasarkan
tahapan tersebut diperoleh informasi terkait dengan model pembelajaran yang
masih berpusat pada guru dan terdahulu, kurangnya penggunaan LKPD dalam
pembelajaran, kurikulum yang digunakan yaitu kurikulum merdeka, dan kurangnya
pemahaman konsep peserta didik pada materi aljabar. Pada fase pengembangan
dilakukan pengembangan LKPD, penyusunan instrumen validasi, kepraktisan, dan
keefektifan, uji validasi oleh tiga validator ahli dengan skor rata-rata sebesar 75,7%
dengan kategori valid , revisi LKPD final dan implementasi LKPD kepada Peserta
didik dengan model pembelajaran Problem Based Learning. Terakhir fase
penilaian, fase ini dilakukan untuk melihat kepraktisan dan keefektifan LKPD.
Kepraktisan LKPD dilihat dari hasil angket respon seorang guru dengan kategori
sangat praktis sebesar 81,9 % dan hasil angket respon peserta didik kelas VII
sebanyak 39 orang dengan kategori praktis sebesar 78,8%. Keefektifan LKPD
dilihat dari hasil uji tes kemampuan pemahaman konsep peserta didik. Memperoleh
hasil sebanyak 76.9% peserta didik yang tuntas KKM dari seluruh peserta didik
yang mengikuti tes kemampuan pemahaman konsep. Sehingga LKPD yang
dikembangkan dapat dikatakan layak untuk digunakan lebih lanjut.
Kata kunci: Aljabar, Kemampuan Pemahaman Konsep, LKPD, Pengembangan,
Problem Based Learning.

This research is development research, the objectives of this research are (1) to
find out the procedures for developing student worksheets (LKPD) based on
Problem Based Learning on algebra material to facilitate students' ability to
understand concepts. (2) determine the validity of LKPD based on Problem Based
Learning algebra material to facilitate students' ability to understand concepts.
(3) knowing the practicality of LKPD based on Problem Based Learning algebra
material to facilitate students' ability to understand concepts. (4) determine the
effectiveness of LKPD based on Problem Based Learning algebra material to
facilitate students' ability to understand concepts. This research uses the Plomp
development model which consists of three phases, namely the preliminary phase,
development phase and assessment phase. In the preliminary phase, problem
analysis, curriculum analysis, student analysis and material analysis are carried
out. Based on these stages, information was obtained related to the learning model
which was still teacher-centred and previous, the lack of use of LKPD in learning,
the curriculum used was an independent curriculum, and the lack of students'
understanding of concepts in algebra material. In the development phase, the
development of the LKPD was carried out, preparation of validation instruments,
practicality and effectiveness, validation testing by three expert validators with an
average score of 75.7% in the valid category, revision of the final LKPD and
implementation of the LKPD to students using the Problem Based learning model.
Learning. Lastly, the assessment phase, this phase is carried out to see the
practicality and effectiveness of the LKPD. The practicality of the LKPD can be
seen from the results of a teacher's response questionnaire with a very practical
category of 81.9% and the results of a response questionnaire of 39 class VII
students with a practical category of 78.8%. The effectiveness of the LKPD can
be seen from the test results of students' ability to understand concepts. Obtained
results of 76.9% of students who completed the KKM from all students who took
the concept understanding ability test. So that the LKPD developed can be said to
be suitable for further use.
Keywords: Algebra, Ability to Understanding Concepts, LKPD, Development,
Problem Based Learning