The Leitner system, originally designed as a flashcard-based learning method, is a structured approach to improving memory retention. This system divides learning materials, such as flashcards or study items, into several boxes or piles. As learners progress, correctly answered items are promoted to higher-level boxes, while incorrectly answered ones are demoted to lower-level boxes. This method optimizes the review of information, focusing more on items that are challenging for the learner. The Leitner system encourages effective and personalized learning, making it a valuable tool for children with special needs to enhance their memory and comprehension abilities.