This is the first lesson in Unit 1. As noted in the introduction, AIR provides scaffolding differentiated for ELL/MLL students at the entering (EN), emerging (EM), transitioning (TR), and expanding (EX) levels of English language proficiency in this prototype. We indicate the level(s) for which the scaffolds are appropriate in brackets following the scaffold recommendations (e.g., [EN]). Where [ALL] is indicated, it means that the scaffold is intended for all levels of students. Scaffolds are gradually reduced as student become more proficient in English.