Introduction The use of digital maps has increased especially in the last twenty years. Digital maps are being used in history, biology, natural history, social sciences and medical epidemiology as well as geography and geography-related subjects. Besides, they provide convenience to individuals in circumstances like finding direction during travelling or shopping. Considering their extensive use, it can be inferred that learning how to read and interpret these maps can be considered as a lifelong learning skill (Jones, A., Blake, C., Davies, C. & Scanlon, E., 2004). Online map concept can be explained as electronic maps prepared by software firms based on the data and visuals obtained from observational satellites in earth’s orbit, which has more up-to-date content than the printed maps and can present the content in two or three dimensions. (Yeşiltaş, 2013). Online maps are practical tools for Social Sciences instruction due to the information and images they present. By using online maps, students can be exposed to map display, satellite image, and road plans of the region they live in, and can be taught a lot of concepts such as how to find direction and scale calculation. Moreover, a more efficient instruction about how to interpret and use maps can be provided to the students with the help of address description feature of these maps. (Yeşiltaş, 2011). These maps can be structured and enriched by markings, explanations, visuals, videos, and drawings for specific purposes to the extent that the software firms allow. In order to make these adjustments on online maps, API (Application Programming Interface), which was released by software firms, is used. When the studies focusing on maps and education are examined, it can be said that the research conducted by Aladağ (2010), titled as “The Effects of GIS on Students’ Academic Achievement and Motivation in Seventh-Grade Social Studies Lessons in Turkey”, investigated the effects of geographical information systems on students’ academic achievement and their motivation levels. According to the data obtained from this quasi experimental study carried out with 44 students, the level of academic achievement and motivation of the experimental group exposed to geographical information systems turned out to be higher than the control group who were exposed to a coursebook set provided by Ministry of Education. In the study “Internet-Based GIS in An Inductive Learning Environment: A Case Study of Ninth-Grade Geography Students” by Milson and Earle (2008) internet-based geography information systems were integrated into 9th grade Geography curriculum as an instructional technology tool. The study revealed that internet-based geography information systems can be effective tools in an inductive learning environment. Moreover, as a result of the analysis of focus group discussion and example of students’ work, it was found out that internet-based geography systems enhances the development of cultural awareness and empathy skills of the students. In his study titled as “Google Earth as A (Not Just) Geography Education Tool”, Patterson (2007) pointed out that Google Earth software has a crucial potential for improving geography instructional methods and other skills of the students. In addition, he emphasized that Google Earth software increases the geographical awareness and improves critical thinking, analysis, and questioning skills of the students in pre-college learning environments. Aktürk, Yazıcı, and Bulut (2013) aimed to develop spatial perception skills which was supposed to be acquired by the students in ‘Living on the Earth’ unit of 6th grade Social Sciences course by using digital maps in their study titled as “The effects of using animation and digital maps in Social Sciences course on spatial perception skills of the students”. In this experimental study, the study group was 50 students. 25 of them took place in the experimental group and the other half of the students were placed in the control group. According to the results of this study, using animation and digital maps has a positive effect on academic achievement level. When the related studies are examined, it can be said that there is no research focusing on the use of web-based online maps in Social Sciences education and structuring online maps for Social Sciences education. The fact that there is no research focusing on online maps which can be an efficient instructional material and activity tool in Social Sciences is considered as a research gap in the related literature. This study was aimed to investigate to what extent the structured online maps in the form of a webpage contribute to the academic achievement level of the students in Social Studies course. Methodology This study, a total of 110 students participated in the study including 60 students at the 6th grade studying in Sivas Mehmet Akif Ersoy Primary School and 50 students at the 6th grade from Amasya Fatih Middle School. In both schools, one of the groups was determined as the experimental group while the other was determined to be the control group according to simple random sampling. While forming the groups, the class size, readiness of the students and their learning features were taken into consideration. In order to equilibrate the experimental and control group, both of them were exposed to a pretest. The average of the pretest scores of the groups were tested with “t” test. The data obtained was analyzed with SPSS 18.0 software. The significance of the results was evaluated within 0.05 significance level. The data obtained was analyzed with two way analysis of variance and independent samples t test. Findings and Conclusion According to the results of the study, it can be concluded that using online maps in Social Studies course increases the academic achievement...