This document discusses silent letters in English words. It begins by asking the reader to think of words starting with "wr-", "kn-", and "ps-", which are examples of words containing silent letters. It then explains that silent letters appear in spellings but make no sound. The document suggests historical changes, borrowing from other languages, and difficult sound combinations as causes for English having many silent letters. Specific examples of words containing silent b, k, g, l, and w are provided. The document concludes by having students complete a worksheet and success criteria about words with silent letters.