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Visual vs digital timers — what research actually says
The evidence behind pie-slice timers, hourglasses, and big-number countdowns
KiwiBee• KiwiBee
May 27, 2026
9 min read
The research question
Does the format of a timer matter? Is a shrinking pie slice more effective than a number counting down? Several studies have examined this, primarily in special education and ADHD contexts.
What the evidence shows
Visual timers provide a more intuitive sense of time for students who struggle with number sense or time perception. The pie-slice format lets students see proportion — 'about half the time is left' — without needing to calculate.
Try both and compare
Use a visual timer for younger students and a classroom timer (numeric countdown) for older ones. Both are free — try them and see what works for your students.