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