When a parent sits down with a child on Thursday evening and drills twenty words for forty-five minutes, two things happen. First, the child gets fatigued and starts making errors they would not normally make. Second, the words go into short-term memory — just long enough for Friday morning, and then gone.
What actually builds spelling recall is the same thing that builds any skill: spaced repetition. Each time your child encounters a word after a gap — even just a day — the brain has to retrieve it rather than just recognise it. That retrieval effort is what moves spelling from fragile to solid.
A five-night routine is not harder than one long session. It is usually shorter in total. The difference is that the work is spread across the week so each night reinforces what happened the night before.
The core principle
Five short nights beat one long Thursday
A child who sees a word on Monday, spells it on Tuesday, revisits it on Wednesday after missing it, and tests themselves on Thursday has encountered that word four times across four days. That is the repetition pattern that makes spelling stick.