Sight Words are a special category of high frequency words which students are taught to recognise automatically. Research suggests that the instant recognition of commonly occurring words gives early readers a boost. The first 25 sight word comprise a third of published works. The first 100 comprise approximately 50% of published works. The first 300 comprise 65% of published works. Although sight words are high frequency words, many are irregular words. Students will often find it is more difficult to accurately spell the sight words within their written work, than the instant recognition.