This paper aimed to find out the degrees of linguistic supports, content based and
affective supports, skill supports, and diversity and flexibility of speaking materials in „Bahasa
Inggris‟ used by the twelfth grade of senior high school. This was a descriptive research type with
content analysis. The English textbook “Bahasa Inggris” published by the Indonesian Ministry of
Education and Culture was the data. Theory of Dat Bao was used to analyze the data. Based on
the analysis, the result of linguistic support shows 82 % which means “Good”. The result of
content-based and affective support shows 87 % which means “fair”. The result of skill support
shows 87 % which means “Good”. Diversity and flexibility shows the result 60 % which “Fair”. It
is concluded that the speaking materials are not fully supported inspiration, imagination, creativity,
and cultural sensibilities to satisfy learners with moments of inspiration, imagination, creativity,
and cultural sensibilities, lack of spoken language characteristics, communication function and
strategies, and variety of speaking materials. It implies that the materials should be elaborated to
fulfill those criteria proposed by Bao‟s.
Key Word: textbook, textbook analysis, speaking materials.