ABSTRAK
Penelitianini bertujuan untuk mengetahui perbedaan pengaruh prestasi pengetahuan, sikap dan ketrampilan pada pendekatan saintifik melalui metode proyek dan eksperimen, kreativitas, kemampuan berpikir kritis dan pebedaan pengaruh terhadap interaksi-interaksinya.
Penelitian ini merupakan penelitian eksperimental. Populasi penelitian ini adalah semua siswa kelas XII IPA SMAN 2Karanganyar tahun pelajaran 2014/2015. Sampel diambil dengan teknik cluster random sampling sejumlah 2 kelas. Data dikumpulkan dengan metode tes untuk prestasi pengetahuan, kemampuan berpikir kritis, angket untuk kreativitas dan sikap  siswa dan hasil observasi untuk ketrampilan. Teknik analisis data menggunakan analisis anava 2x2x2.
Hasil pada penelitian ini adalah 1) ada perbedaan hasil belajar antara pendekatan saintifik melalui metode proyek dan eksperimen terhadap nilai pengetahuan, sikap dan ketrampilan. 2)ada perbedaannilaipengetahuan, sikapdan ketrampilan antara kreativitas tinggi dan rendah.3)ada perbedaan nilaipengetahuan, sikap dan ketrampilan antara kemampuan berpikir kritis tinggi dan rendah, 4) tidak ada interaksi antara pendekatan saintifik melalui metode proyek dan eksperimen dengan kreativitas terhadap nilaipengetahuan, sikap dan ketrampilan. 5)interaksi antara pendekatan saintifik melalui metode proyek dan eksperimen dengan kemampuan berpikir kritis memberikan pengaruh yang signifikan terhadap nilai sikap dan ketrampilan, tetapi tidak memberikan pengaruh nilaipengetahuan 6) ada interaksi antara kreativitas dan kemampuan berpikir kritis terhadap nilaipengetahuan, sedangkan nilaisikap dan ketrampilan tidak ada pengaruh 7)interaksi antara pendekatan saintifik melalui metode proyek dan eksperimen dengan kreativitas dan kemampuan berpikir kritis tidak ada pengaruh terhadap nilaipengetahuan, sikap dan ketrampilan.
Kata Kunci : Pendekatan saintifik, proyek, eksperimen, kreativitas, kemampuan berpikir kritis, prestasi belajar.
ABSTRACK
This study aims to determine the effect of differences in knowledge, attitude and skillsachievement. The scientific approach through experimen methods and projects, creativity, critical thinking skills and the average difference between the effects of the interactions.
This research is experiment. The study population was all students of class XII Science SMAN2Karanganyar Year 2014/2015. Samples in research as much as 4 classes taken in a cluster random sampling. Data collected by  the method of test for knowledge achievement, the critical thinking skills, the question  naire for the creativity and attitude achievement, while the observation for skills learning achievement of students. Analysis using ANOVA analysis 2x2x2.
The results in this study were 1) there is adifferences influence knowledge, attiyude and skillslearning achievement between scientific approach through experiment methods and projects. 2) there are differences in the influence of knowledge and skills achievement between high and low creativity, while there was no difference in the effect of attitude learning achievement between high and low creativity. 3) there are differences influence learning achievement of knowledge, attitude and skills between critical thinking skills of high and low, 4) the interaction between scientific approach through experiment methods and projects with creative does give same effect influence on knowledge, attitude and skillsachievement. 5)the interaction between the approach through experiment methods of scientific and critical thinking skills project with significant effect on the learning achievement of knowledge, attitude and skills 6)the interaction between creativity and critical thinking skills does give same effect to the achievement of the knowledge, whileinteraction between creativity and critical thinking skills does significant give effect to the achievement of the affective and psychomotor 7) the interaction between the approaches methods of The scientific through experiments and projects with creativity and critical thinking skills does give same effect to the learning achievement of the knowledge, attitude and skills.
Keywords: The scientific approach, projects,experiments,creativity, critical thinking skills, learning achievement.