Looking through the studies in our country, it is seen that teachers’ and students’ opinions have been received regarding the course books and in addition to all these, parents’ views have been received about course books. As for the aim of this research, it is to analyze the distributions of Programme for International Student Assessment (PISA) basic mathematical skills levels (communication, devising strategies, representation, using symbols, reasoning and argumentation, and mathematizing) on the questions in one of the prevailing 8th Grade mathematics course books. Document review was used in this research. In order to analyze the questions, the course book was divided into two sections: content, assessment and evaluation. The resource which was subjected to document review is one of the Ministry of National Education 8th grade mathematics course books which were used during 2017-2018 academic year. Each skill was categorized between the Level 0 and Level 3. After the analysis, findings were converted to table under five learning domains and level distribution percentages of each skill were stated there. As a result of the research, it was seen that low level questions of six skills, studied generally in learning domains, were included predominantly in the course book. It was realized that especially low level questions were dominant in possibility learning domain. In accordance with the results obtained, researchers are suggested to study for these problems: "How should we place PISA basic mathematical skills under five learning domains?" and "How should these skills differentiate according to learning domains?".