<![CDATA[Critical thinking abilities are one of the needed thinking skills to face the challenges of the 21st century. This research aims to determine the influence of the Stim-HOTs learning model toward student's critical thinking ability reviewed from the academic ability. Stim-HOTs is a learning model that can stimulate student's higher-order thinking skills, one of which is critical thinking. This research was a quasi-experimental research with posttest only nonequivalent control group design. The population of this research was all of the 11th-grade students of MIPA in SMA Negeri 5 Surakarta academic year 2019/2020. This research, using 2 classes for the sample, one class using Stim-HOTs learning model as experiment class, and the other class using discovery learning model as control class. The data were collected through a critical thinking essay instrument developed by Prihatiningsih that has been through expert validation. The data that has been tested for normality and homogeneity were analyzed by two-way ANOVA to test the hypothesis. The result using ANOVA two ways test shows 1) critical thinking ability based on learning model has a significant value higher than 0,050, 2) critical thinking based on academic ability has a significant value higher than 0,050, and 3) critical thinking based on learning model and academic ability has a significant value lower than 0,050. The research concluded that 1) Stim-HOTs learning model had a significant effect on critical thinking ability, 2) student's academic ability had a significant effect on critical thinking ability, and 3) there is no interaction between Stim-HOTs model and student's academic ability toward critical thinking ability.]]>
