A 6th–8th darkroom line. Each deal is one story — Independence, The Union, The wall. Hold the print and Hang the missing beat. After you Pin here, The strip develops so you see why that beat sits there.

Hold the print
Easy shows the year and the thread. Medium and hard hide the tray year. Hang the missing beat on Independence, The Union, or another thread.
Hang it in a gap
The line is time. Left is earlier. Pin here before both, between them, or after both.
The strip develops
A hit scores Pins and shows the story. Tap Next print for the next thread. A miss tells you the beat is before both, between them, or after both — and why.
One thread, not three random years
Tea Party with the Constitution. Brown with the Civil Rights Act. A wall that goes up, then comes down.
The strip develops
A hit hangs all three prints in order and names the why — not just the year.
US then world
Easy is Independence, The Union, The ballot, Two world wars. Hard hides years and goes to After Rome and Crowns.
Chronology is not sorting three random numbers. It is hanging one beat on a thread you can already see — tax protest, then a country, then a written plan — instead of memorizing a multiple-choice year.
A story, not a sort
Kids see why the print belongs there after it hangs.
Stops 3rd-grade stacking
Tagged 6th–8th. It does not add to the 86-game 3rd-grade pile.
On easy, the year is on the print so kids learn the thread. Medium hides the tray year. Hard hides hanging years until The strip develops.
World threads from After Rome to The wall. Hang the print using titles, then read why the three beats belong together.