Sight words, or high frequency words, are commonly used words which students learn to recognize instantly “by sight” without decoding. Many of these words do not follow a spelling pattern, which can make them difficult to sound out and spell. Teaching sight words to young learners is a necessary step in building a strong educational foundation.
Sight words account for about 75 percent of the words in beginning readers’ print materials, so it’s important for children to learn the correct spelling. The ability to automatically recognize beginning sight words from relevant lists allows beginning readers to identify many words in a text, and thus be able to concentrate on meaning and comprehension as they read without having to stop and decode every word. The use of sight words in context can greatly affect the meaning of a sentence and, in turn, the story itself. Utilizing sight word writing practice for kids early on helps solidify the foundation.(https://www.spellingcity.com/sight-words.html)