This study explored K-3 elementary schools teachers' perceptions towards impacts of Common Core State Standards on early childhood education. A total of 54 teachers completed a questionnaire in which they were asked to rate the 9 questions related to their background, and then the extent to which they agree with 20 statements. The results showed no statistically significant difference of 9 factors by age group, years of teaching, and degree. There was statistically significant difference in 9 factors such as teaching grade, years of teaching the same grade, and school district. These findings could be used to answer that the implementation of the CCSS had some impacts on K-3 teachers, and these impacts had no relation with age group, years of teaching, and degree, but significantly related with teachers' teaching grade, years of teaching the same grade, and school district.