Usage-based approaches to second language acquisition put a premium on the linguistic input that learners receive and predict that any sequences of words that learners encounter frequently will experience a processing advantage. The current study explores the processing of high-frequency sequences of words known as 'lexical bundles' in beginner learners of English in Japanese secondary school. To do this we use a phrasal judgment task, testing students on items taken directly from their teaching materials. Students responded to lexical bundles that occurred in their textbooks significantly faster and more accurately compared with non-lexical bundles, and were sensitive to the frequency of occurrence in their textbooks. This study shows, perhaps for the first time, that even very low-level, beginner secondary students are sensitive to the frequency of lexical bundles which appear in the input they receive from teaching materials, a finding that has important implications for teaching and material design.