Machines That Changed American Work is a free printable Grade 3 to Grade 5 social studies worksheet on how inventions raised productivity, and what might come next, aligned to C3 Framework indicator D2.Eco.13.3-5. It prints 3 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 25 of 25 · the same problems every time you open this link.
Set 1 has all 25 in a single PDF. All 25 sets ask different questions.
Machines That Changed American Work
D2.Eco.13.3-5
NameDate
Draw a line from each invention to what it changed. Then write your prediction.
1.Draw a line from each one to its match.
Personal computer, 1970s
Refrigerated railroad car, 1870s
Steel plow, John Deere, 1837
Barbed wire, Joseph Glidden, 1874
A.Carried fresh meat across the country without spoiling
B.Cut through thick prairie soil so farmers could plant more land
C.Fenced huge areas cheaply and closed the open range
D.Let one office worker do tasks that once took many people
2.Draw a line from each one to its match.
Cotton gin, Eli Whitney, 1793
Light bulb, Thomas Edison, 1879
Telephone, Alexander Graham Bell, 1876
Assembly line, Henry Ford, 1913
A.Let factories and homes keep working after dark
B.Built cars step by step, cutting the time to make one
C.Cleaned cotton fast, which led planters to enslave even more people
D.Let people talk to each other over long distances
3.Choose one invention from this sheet and explain how it helped people produce more. Then predict an invention that could help farmers grow more food in the future.
I named an invention and what it changed.
I explained how it helped people produce more.
I described a future invention for farmers and how it would help.
LessonPrint · D2.Eco.13.3-5 · Set 25 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 25. Prints on its own sheet.
1.1. Personal computer, 1970s — D (Let one office worker do tasks that once took many people) 2. Refrigerated railroad car, 1870s — A (Carried fresh meat across the country without spoiling) 3. Steel plow, John Deere, 1837 — B (Cut through thick prairie soil so farmers could plant more land) 4. Barbed wire, Joseph Glidden, 1874 — C (Fenced huge areas cheaply and closed the open range)
2.1. Cotton gin, Eli Whitney, 1793 — C (Cleaned cotton fast, which led planters to enslave even more people) 2. Light bulb, Thomas Edison, 1879 — A (Let factories and homes keep working after dark) 3. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances) 4. Assembly line, Henry Ford, 1913 — B (Built cars step by step, cutting the time to make one)
3.Names an invention from the sheet and explains how it helped people produce more, then predicts a believable future invention that would help farmers grow more food, with a reason.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.