Lesson Timer
A big pie timer that splits a class period into named parts (warm-up, investigate, clean-up) so everyone can see what's next and how long is left.
Ready
0:00
How to use it
List the parts of your lesson and how many minutes each gets, then press Start and go full screen. The coloured slices show the whole period; the shaded part is time already used. A soft chime plays when each part ends. Your plan is saved on this device for next time.
Free to use, no account needed. It runs in your browser: nothing you type, and no sound from your microphone, is sent to Fieldbook.
Hands-on lessons to pair with Lesson Timer
Ready-to-teach units, each lesson a printable teacher guide and student sheet. Your first three lessons are free.
Evidence Lab
How do you know something is true? Students test a claim with their own measurements, find out why one result is never enough, and learn to tell strong evidence from weak.
Test the Claim: Science Facts, Myths and AI Answers
Sayings, ads, forum posts and AI chatbot answers all sound sure of themselves. Students put popular claims to a real hands-on test, grade the answers, and learn how to decide which sources deserve their trust.
Measure It: Length, Time and Mass in the Real World
Whose foot is the right ruler? How long is a minute, really? Is a kilogram of feathers lighter than a kilogram of rocks? Four lessons where students measure length, time and mass with real tools, then use their own data to settle an argument.
Three full lessons, free
Make a free account and download any three Fieldbook lessons, from any grade or subject, as printable PDFs. No card needed.
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Lab Stopwatch
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Fair Test Planner
Plan an experiment step by step: question, variables to change, measure and keep the same, prediction and method. Prints as a one-page plan.