Effects of Using Flashcards to Teach Vocabulary in Public Schools in Sidoarjo, East Java

The purpose of this study is to know the effect of using flashcards for teaching vocabulary of the third graders at a public elementary school in Sidoarjo, East Java, Indonesia. This study used quantitative research with a pre-experimental design by applying pre-test and post-test instruments. Quantitative data were analyzed using the Independent T-test formula test to determine the difference between pre-test and post-test on the students’ achievement using flashcards. In the pre-test value there is an average value of 50 and the post-test value has an average value of 66 while for the t-test value of 7.615 was higher than t-table 2.003 at the level of significant 0.05 with the degree of freedom (df ) 56. The results of this study found that the use of flashcards had an effect on the students’ achievement of the vocabulary mastery.