Students are not distracted by phones. They are distracted by the gaps in the plan.

The OECD released the PISA 2025 results on 8 September 2026. More than 760,000 students took part, representing around 33 million 15-year-olds across 91 countries and economies. One finding belongs on every staffroom wall: on average, 28% of students reported that classmates were distracted by digital devices during most or every science lesson. Students surrounded by distracted classmates perform less well, are less engaged in learning and feel less connected to their school.

The damage lands on the student next to the screen, not only on the one holding it. Attention in a room is shared. One open feed recruits the next.

What a ban does, and what it leaves untouched

The report also finds that in schools where cell phone use is not allowed on the premises, students are about 13% less likely to report digital distraction. In China (B-S-J-Z), Japan and Korea, fewer than 10% report it. Moderate use of digital devices for learning is associated with stronger science performance; excessive use and digital distraction go with weaker outcomes.

But look at what the 13% measures. A ban lowers reported distraction. It does not fill the minute in which a student has finished and waits for the slow table, or the nine minutes of set-up talk before the first task, or the discussion where three people speak and twenty-five watch. Remove the phone and that minute is still empty. The student stares at the wall, then starts the conversation that pulls the row along. Education International reads the same results through teacher shortages and shrinking attention spans. A single teacher cannot fix either by Monday. The plan is the one thing they can change tonight.

One caveat: PISA surveys 15-year-olds, so this is secondary-school evidence. The design problem is the same in a university seminar or a training room, but the numbers belong to teenagers.

The gap is the design flaw

Over the last 90 days, a small but steady group of people have been designing for a class on Metodic. Most of those slots were 120 minutes or shorter; none passed four hours. A lesson is a fixed, short container. In a short container, every minute can be accounted for.

Design rules for a teaching slot should be numbers, not adjectives:

• Every student produces something within the first 6 minutes, written and visible to a neighbour.
• No block longer than 12 minutes without something to hand in, hold up or swap.
• Teacher talk is capped at 8 minutes in a row.
• Every discussion ends in a written output per person, not per group. Groups hide passengers.
• Fast finishers get a named second task, printed on the same sheet, before the lesson starts.

A 60-minute class plan to run tomorrow

Topic-agnostic: swap in your content and keep the minute ranges and the outputs. Materials: one A4 sheet per student with four numbered boxes, a pen, sticky notes, a wall.

1. 0-6: Cold start. The lesson question is on the board before students walk in. Each student writes a one-sentence answer in box 1 and a confidence score from 1 to 5. Silent. Output: a sentence and a number per student.
2. 6-14: Pair check. Swap sheets with a neighbour. Read their sentence and write one question about it in their box 2. Hand back. Output: one written question received per student.
3. 14-22: Input. The teacher explains the core idea in 8 minutes, no more. Each student writes in box 3 the one thing that changes their box 1 answer. Output: one revision note per student.
4. 22-34: Apply. Each student works one problem or case alone. Fast finishers move to the printed second task. Output: one completed attempt per student.
5. 34-44: Compare. Trios. Each person names one place where their attempt differs from the others; the trio writes its best answer in box 4 on all three sheets. Output: one agreed answer per student.
6. 44-52: Post and read. Each trio copies box 4 onto a sticky note and posts it. Everyone reads three other notes and ticks the one they would defend. Output: three ticks placed per student.
7. 52-60: Exit ticket. Back to box 1. Rewrite the sentence beneath the original, rescore confidence, hand the sheet in at the door. Output: a before-and-after answer per student, in the teacher's hands.

Count the gaps. The longest stretch without a required output is the 8-minute input, and it ends in a written note. Nobody waits for anybody. The phone stays in the bag because there is no minute in which picking it up is free.

Once this holds for a week, the structure carries any topic. Brief Session Studio with the class length, the group and the one thing every student must produce, and build the next lesson from there.

Sources

• OECD, PISA 2025 Results (Volume I), 8 September 2026
• Education International, New PISA report reveals decline in student performance amid chronic teacher shortage and shrinking attention spans, September 2026