Įsidėmėtinos rašybos lietuvių is a learning tool for primary and basic classes, aimed at learners of the Lithuanian language. The program consists of several chapters, and in each of them, the spelling of a word is presented in different ways and its pronunciation is also given. The main difference between the chapters is the way of learning the word: the first one is presented as a word in the sentence, while the second one is presented as a word in the sentence and its meaning. In addition, the first one has a longer and easier introduction, while the second one has a shorter and more difficult introduction. The program is based on two educational programs of the Lithuanian language: the Primary Education and the Basic Education.