Key Spelling is a series of graded activity books containing puzzles & problems that will reinforce children's essential spelling skills & knowledge. Key Spelling Book 2 covers: vowel sounds made by more than one letter (for example 'ui' & 'oy') letter blends such as 'gl' 'fr' & 'sk' the 'wh' digraph word endings (for example 'er' & 'are') & silent letters (for example 'b' in comb).