The purpose of the present study is to examine the effects of the Thinking from Multidimensional Perspectives Program on 5 and 6 year-old preschoolers" school readiness. The study was conducted over a total of 153 children, 76 of them forming the control group and 77 of them forming the experiment group. There were 63 children in age group 5 and 90 children in age group 6. 73 of these children were girls and 80 of them are boys. The study format used was the experimental design and pre-test/post-test control group model. In the experimental group, the Thinking from Multidimensional Perspectives Training Program was implemented. The Metropolitan School Readiness Test was used for pre-test and post-test. In order to determine whether there was a difference between the scores of experiment and control groups (pre-test, post-test), independent t-test was used. In addition, to record the progress of the experiment and control groups within themselves, and to test the differences (pre-test, post-test) dependent t-test was used. To test the differences, 0.05 significance level is taken. As a result of the study, it was found that the Thinking from Multidimensional Perspectives Training Program has a positive impact on school readiness of 5 and 6 year-old preschoolers. Additionally, the applied program increases 5 year old children's school readiness scores much more than 6 year-olds.