Learning achievement needs to be improved with innovative learning models. because if learning is monotonous and conventional, students will be bored. Therefore, the learning model of discovery learning and think talk writing will be tested to find which learning model is more effective in improving student achievement. The results of the study: 1) there is an effect of the Discovery Learning model on the Science Learning Achievement of Class V Karangsari 3 Karangtengah Demak Elementary School based on the results of the paired samples test obtained the value of Sig. (2-tailed) obtained 0.000 < 0.05, or t-count 14.634 > t-table 2.10982, 2) there is an effect of the Think Talk Write (TTW) learning model on the Science Learning Achievement of Class V Karangsari 1 Karangtengah Demak State Elementary School, based on the results of the paired samples test obtained the value of Sig. (2-tailed) obtained 0.000 < 0.05 or t-count 10.558 > t-table 2.09302, and 3) There is a difference in science learning achievement on respiratory material between grade 5 students who are taught using Discovery Learning and Think Talk Write (TTW) in elementary schools; it is known from the experimental class 1 using the Discovery Learning model, which is 27.665 which is greater than the experimental means value. 2 using Think Talk Write (TTW) 23.030.