Various exercises are developed to help build their vocabulary. Long before they are ready to read and write, children learn to use appropriate terms  like, hot, warm or cold and hot, hotter or hottest. They practice simple words to communicate with each other. Once their speech is clear they are introduce to basic phonetic sounds and phonograms. Reading and writing is gradually progressed into grammar, punctuation and more. Numerous exercise are developed to increase their vocabulary of the general knowledge also.