Themes: Realistic Life, Emergent Reader, Full Color, Fiction, Teen, Young Adult, Hi-Lo, Hi-Lo Books, Hi-Lo Solutions, High-Low Books, Hi-Low Books, ELL, EL, ESL, Struggling Learner, Struggling Reader, Special Education, SPED, Newcomers, Reading, Learning, Education, Educational, Educational Books. TERL Boosters offer expansion opportunities for your Teen Emergent Reader Libraries. Unlike the libraries, Booster titles are sold individually. Each Booster level supports a TERL library. Boosters can also stand alone and are excellent hi-lo classroom books. There are six Booster titles supporting each level of TERL. STEM Boosters offer a unique way to delve into science, technology, engineering, and math for emergent readers. Verse Boosters introduce readers to the versatility of contemporary poetry.