No abstract

The results of the reading literacy test for Indonesian children at national and international levels were low. Literacy tests are carried out by measuring aspects of understanding, using, and reflecting the results of reading in writing that contains vocabulary. Vocabulary is one of the important things that supports the development of student literacy. Thus, the vocabulary is important to study. This study identified the development of reading and writing vocabulary of junior and senior high school students. This research is descriptive quantitative. The data of this study were in the form of vocabulary derived from books of high school Indonesian students grade VII to grade XII based on the 2013 curriculum and the results of the writing of junior and high school students from grade VII to grade XII. Data were collected by entry application software. For data analysis, the linkage technique of comparing and contrasting was used. The results showed that the development of the number of Indonesian language entries in junior and high school student books was not good, tending to be stagnant. Compared with the results of similar studies in other countries, Indonesian language student books with the number of entries slightly less support literacy development include critical, creative, communicative, and collaborative thinking skills of junior and high school students. Conversely, the development of written vocabulary of middle school students has increased significantly.

Vocabulary is the most basic part of a language. The more vocabularies a person has, the more competent that person is in communicating. Mastery of vocabulary as a material for one's communication should be developed throughout life because the language is always evolving. Related to this, the paper aims to describe (1) the development of vocabulary in high school student books, (2) favorite entries, and (2) learning scenarios for vocabulary development. To disclose these, this research uses the entry application, basic vocabulary list, and literacy strategies in learning. The results of the analysis show that (1) the development of the number of Indonesian language entries in the high school student's book is not good, (2) favorite entries of SMA are "yang" and "dan"; (3) Learning scenarios in vocabulary development can be carried out by various means using other sources outside the student's book to further enrich the vocabulary. This is accompanied by a literacy strategy in learning. The results of this study can be used by teachers to further improve learning so that the development of high school students will be better.