The high water content in dragon fruit causes the fruit to be easily damaged, therefore it needs to be processed to reduce the amount of loss, including making it into jam. In addition, processing dragon fruit into various processed products also aims to overcome the problem of excess production when the harvest season arrives. The aim of this research was to obtain the ratio of dragon-sugar fruit which gave the best influence on the physical, chemical and organoleptic characteristics of jam. The study used a completely randomized design (CRD) for the analysis of physical parameters of jam (softness) and chemical jam (water content, total dissolved solids, anthocyanin and vitamin C levels). Randomized Group Design (RBD) for analysis of organoleptic test parameters (color, texture, taste and preference). As a treatment, it is the ratio of dragon-sugar, which consists of five levels of treatment, namely P1 = dragon fruit 450 g: granulated sugar 550 g, P2 = dragon fruit 500 g: granulated sugar 500 g, P3 = dragon fruit 550 g: sugar 450 g, P4 = dragon fruit 600 g: granulated sugar 400 g, P5 = dragon fruit 650 g: granulated sugar 350 g. Each treatment was repeated 3 times so that there were 15 experimental units. The data obtained were analyzed using F test 0.01 and 0.05. If the treatment has a significant or very real effect, then proceed with the BNJ test at tararf 0.01 and 0.05. The results showed that treatment P4 (600: 400 b / b dragon-sugar ratio) gave the best influence on the physical, chemical and organoleptic characteristics of dragon fruit jam. This treatment can reduce the use of sugar by 15 percent from the standard use of sugar in making jam.

Penelitian ini dilaksanakan di SMPN 6 Takengon Aceh Tengah, yang terletak di Desa Pinangan Kecamatan Kebayakan Kabupaten Aceh Tengah. Waktu penelitian dilaksanakan pada semester 2, tahun pelajaran 2014/2015 pada bulan Februari-April 2015. Subjek dalam penelitian ini adalah siswa kelas IX-1 SMPN 6 Takengon Aceh Tengah sebanyak 22 orang, dengan rincian putri sebanyak 10 orang dan putra 12 orang. Teknik pegumpulan data menggunakan instrumen berupa observasi dan dokumenter. Penelitian ini merupakan penelitian tindakan kelas (classroom action research) yang ditandai dengan adanya siklus,adapun dalam penelitian ini terdiri atas 2 siklus. Setiap siklus terdiri atas perencanaan, pelaksanaan, pengamatan dan refleksi. Penerapan pembelajaran kooperatif learning model jigsaw dapat meningkatkan kemampuan belajar siswa pelajaran IPA khususnya kompetensi dasar mengidentifikasi kelangsungan hidup makhluk hidup melalui adaptasi, perkembangbiakan dan seleksi alam bagi siswa kelas IX-1 pada semester 2 di SMPN 6 Takengon Aceh Tengah Tahun Pelajaran 2014/2015. Pada akhir siklus I, siswa yang mencapai ketuntasan belajar sebanyak 68.18% (15 siswa), dan siswa yang belum tuntas sebanyak 31.81% (7 siswa), sedangkan pada akhir siklus II, sebanyak 100% (22 siswa) mencapai ketuntasan belajar. Dengan nilai rata- rata kelas siklus I : 72,5 dan rata- rata kelas siklus II 80. Adapun hasil non tes pengamatan proses belajar menunjukkan perubahan siswa lebih aktif selama proses pembelajaran berlangsung. Secara keseluruhan rata-rata kelas mencapai kenaikan sebesar 58,59%, dan ketuntasan belajar siswa secara keseluruhan mencapai peningkatan sebesar 53% jika dibandingkan dengan kondisi awal.