Illustration is very important media. It is the media from which children learn especially when they are 5 to 6 years old. If they don't know the meaning of illustration, they find it senseless. Illustration as any material which is used in education, should follow and support child's cognitive development. Semiotics despite its unfamiliarity is very important part of child's cognitive development. Different symbols are learned at different stages and there are a lot of symbols in textbook's illustration. The semiotic analysis of three textbooks for young learners (Playway to English 1, Magic Adventure 2, Cookie and Friends) showed that these textbooks need some corrections according to child's cognitive development and their visual perception. The textbook's illustrations all include "motion devices" and what is ever more the same symbols represent different meanings.
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