<![CDATA[This research aims to develop students’ worksheet-based on PBL and test its effectiveness toward students’ mathematical communication skills and self confidence of class VIII SMP Negeri 8 Bandar Lampung. This research procedure uses the procedure by Tessmer, namely preliminary phase and formative evaluation phase which includes self evaluation, prototyping (expert reviews, one-to-one, small group) and field test. The data was obtained through mathematical communication test and self confidence scale. The results of the expert reviews show that students’ worksheet-based on PBL has met the feasibility standards of content, media and language in very good category. the result of the one-to-one and small group show very good category. The results of data analysis in the field test showed that the student mathematical communication skill and self confidence in the experimental class is higher than the control class. It can be concluded that students’ worksheet-based on PBL is effective to improve the students’ mathematical communication and self confidence.Penelitian pengembangan bertujuan mengembangkan LKPD berbasis PBL dan menguji keefektifannya terhadap kemampuan komunikasi matematis dan self confidence peserta didik kelas VIII SMP Negeri 8 Bandar Lampung. Prosedur penelitian ini menggunakan prosedur Tessmer, yaitu tahap preliminary dan formative evaluation yang meliputi self evaluation, prototyping (expert reviews, one-to-one, small group) dan field test. Data penelitian diperoleh melalui tes komunikasi matematis dan skala self confidence. Hasil expert reviews menunjukkan bahwa LKPD berbasis PBL memenuhi standar kelayakan isi, media dan bahasa yang termasuk dalam kategori sangat baik. Hasil one-to-one dan small group termasuk dalam kategori sangat baik. Hasil analisis data field test menunjukkan kemampuan komunikasi matematis dan self confidence peserta didik kelas eksperimen lebih tinggi dari kelas kontrol. Sehingga disimpulkan LKPD berbasis PBL efektif meningkatkan kemampuan komunikasi matematis dan self confidence peserta didik.Kata kunci : LKPD, PBL, komunikasi matematis, self confidence]]>
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