The class reseach action is a srcrutiny of the activities of learning in the form of an action, a deliberately raisedand occur in a class together. The subjects of this study were 14 persons in the class VI SDN 006 Koto Sentajosub-district Sentajo Raya. The result in this reseach to teacher activity in first meeting of cycle I is obatained54,16 %, in second meeting obatained is 70,83%, in the cycle II at first meeting is obtained 85,8% and thesecond meeting is obtained 95,8%. Student activity data obtained in cycle I the first meeting of 54,16%, secondmeeting is obtained 62,5%, in the cycle II at first meeting is obtained 79,16% and second meeting 95,8%. On thecompleteness of science learning outcomes students who comlete on the initial data of 42,86% with averagelearning outcomes 62,5, in the cycle I the outcome is 64,3% with average learning outcomes 75,6, in the cycle IIis obtained 86% with average outcomes 92,4. It can be concluded that cooperative learning type TSTS canimprove science learning outcomes.