<![CDATA[The student worksheets which were developed has characteristics that able to trained students to construct the right concept so student can be spared from misconception. Expert’s validation result toward the suitability of content, construction, and readability aspect has percentage in the number 89.11% which is very high category. Based on teacher’s respons to the suitability of content has percentage in the number 87.30% , construction 93.33%, and readability aspect 87.90% which is very high category. Based on students’ responses of readability aspect has percentage in the number 91.42% and attractiveness aspect 90.18% which is very high category. So it was concluded that the student worksheets is valid and proper to use.LKS yang dikembangakan memiliki karakteristik yang mampu melatihkan siswa untuk membangun konsep yang sesuai sehingga siswa terhindar dari miskonsepsi. Hasil validasi ahli terhadap aspek kesesuaian isi, keterbacaan, dan kemenarikan memiliki rata-rata persentase sebesar 89,11% dengan kategori sangat tinggi. Berdasarkan tanggapan guru terhadap aspek kesesuaian isi diperoleh persentase sebesar 87,30%, konstruksi sebesar 93,33%, dan keterbacaan sebesar 87,90% dimana ketiga aspek tersebut berkategori sangat tinggi. Berdasarkan tanggapan siswa pada aspek keterbacaan diperoleh persentase sebesar 91,42% dan aspek kemenarikan sebesar 90,18% yangberkategori sangat tinggi.Sehingga LKS dapat dikatakan valid dan layak untuk digunakan.Kata kunci: Lembar Kerja Siswa, perubahan konseptual, asam basa]]>
