Final answer:
Elementary students expand their vocabulary by being exposed to language in various contexts, through reading, and through directed conversations. Interventions like language-rich preschool programs can also significantly aid vocabulary growth.
Step-by-step explanation:
Elementary students are likely to expand their vocabulary through a variety of activities and experiences. Reading widely, both fiction and non-fiction, exposes students to new words and helps them understand how words are used in context. Additionally, engaging in conversations with teachers, classmates, and family members provides opportunities for students to practice using new vocabulary and to learn from others.
Teachers can also incorporate vocabulary-building activities into their lessons, such as word games, vocabulary journals, and vocabulary quizzes. These activities encourage students to actively engage with words and reinforce their understanding of new vocabulary. Overall, the key to expanding vocabulary is exposure to a wide range of words and meaningful opportunities to use and practice them.