This study aims to analyze the effect of students™ worksheet (LKPD) based on process skills of science and motivation level learning outcomes of science. This study was a quasy experiment with factorial 2x2 design. The study population is grade IV SD Negeri 164330 Padang Hilir District, Tebingtinggi City, and the sample was chosen by total sampling as two classes. The instruments used is test, motivation questionnaire, and observation sheet of scientific attitude. Data obtained from the study instrument then analyzed with using the two-way anova. The results showed that: (1) the effect of LKPD based on process skills of science towards the learning outcomes of science is better than conventional LKPD; (2) the effect of high motivation towards the learning outcomes of science is better than low motivation; (3) there is an interaction between LKPD based on process skills of science and conventional LKPD with motivation level in influencing learning outcomes of science; and (4) the scientific attitude of students using LKPD based on process skills of science is better than the conventional LKPD. The results of this study suggest that LKPD based on process skills of science and high learning motivation is an alternative choice of teachers in improving students' learning outcomes of science.
