The article analyzes the importance of using visual aids in the learning process of primary school students. The importance of using interactive posters as a modern demonstration tool is substantiated. It was described 9 effects of interactivity on the example of the electronic educational resource “Mathematics for the 1st grade. Interactive posters” (author Rybalko O.O.). Using these effects, a teacher can move objects along the web page and make notes in a specially designated place. A very important feature of interactive posters is the ability to make objects visible or invisible, and the use of special commands allows teachers and students to close and open the corresponding records and images. Examples of expedient use of different types of animation and the effect of painting the corresponding image elements are given. It is also possible to play or stop audio and video at any convenient for a teacher time with the help of special buttons. In addition, this electronic educational resource has programmed buttons to clear e-pages from used images and recordings. All these interactivity effects work reliably thanks to the author’s own technology for designing interactive electronic posters in the Adobe Flash CS3 environment. The use of the programming language Action Script 2.0 provides the implementation of effective management of electronic educational resources and the possibility of implementing the application of these effects in the process of conducting lessons in primary school. Due to the different interactive effects interactive posters are more visually attractive than graphic or ordinary posters. Their usage helps support the emotional level of students. It also gives the opportunity to add teaching materials that are given in the text- books. Correct usage of interactive posters at lessons assists to form clear contents concepts, to develop logical thinking and language. It is useful in considering and analyzing the certain phenomena to come to generalizations that are applied in further practice. Such suggested methodic is considered to be perspective for using interactive posters in pre-school educational establishments and those with inclusive training. They can be used to illustrate the learning process not only in mathematics, but also in other subjects studied in primary school. In addition, some interactivity effects that can be used in middle and high school are to be studied.