A completed project product
Classroom invention — finished design brief: Quiet Turn Timer. Problem: discussion groups often lose track of speaking time. Design: a large visual countdown with a silent colour change and a text label, so meaning does not depend only on colour. Use: choose two minutes, start, pause if interrupted, reset for the next person. Benefit: students can share turns without a loud alarm. Limitation: it cannot judge whether contributions are fair or relevant. Test plan: ask three consenting classmates to find start, pause and reset without help, then record real difficulties. The poster includes the labelled design, instructions and limitations. No test result is claimed here.