The current study aims at investigating the to investigate the effect of sticky note strategy in developing vocabulary Al- Sulaymaniyah University. To achieve the aim of this study, Investigating the effect of sticky note strategy in developing vocabulary.To achieve the aims of this study, a hypotheses is assumed to be established there is no statistically significant difference between the mean scores of experimental group in pre- and post-performance tests .A sample of sixty two students from the second stage at Al- Sulaymaniyah university, were randomly selected to carry out the study's aims and validate its hypotheses. The two groups are divided evenly, with group (A) being the experimental group and consisting of (31) students who have been instructed using sticky note strategy. Group (B) stands for the control group, which consists of (31) students who have received traditional instruction. Making a pre and post achievement test, Both groups have been equalized in such variables such as educational level of parents, English scores achievement in preceding year, and the pre-test of both groups. A posttest is made up of two oral questions and three written questions. The dependability coefficient has been validated using the Alpha-Cronbach method. A statistical study of the items has been done to determine the discrimination power and level of difficulty for each item. As a result, the post-test has been administered to the full sample. The formula for "the T-test of two independent and paired samples' has been employed to statistically analyze the data acquired from the post-test results. There is a statistically significant difference between the mean scores of the experimental group" when using the sticky note strategy. Appropriate recommendations and suggestion for future research are made in light of the study's results and conclusions.