For adults this is usually seven plus or minus two. Emotions influence the content of working memory. Long-term Memory forms only when information is actively processed. You recall a phone number after repeated use or by association, eg. Proceedural Memory is motor memory or body learning.
Many students often remember hands-on learning best.
Some skills, such as driving a car, can only be learned by doing. Reflexive Memory is full of automatic, instant associations. It has been referred to as the hot stove effect. Reflexive learning is the goal when using flashcards to teach math facts, but too often the reflex is fear. Many students need associations and context to develop reliable retrieval of math facts.