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 15 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.
Steel plow, John Deere, 1837
Barbed wire, Joseph Glidden, 1874
Airplane, Wright brothers, 1903
Personal computer, 1970s
A.Fenced huge areas cheaply and closed the open range
B.Let one office worker do tasks that once took many people
C.Cut through thick prairie soil so farmers could plant more land
D.Carried people and mail through the air
2.Draw a line from each one to its match.
Telegraph, Samuel Morse, 1844
Light bulb, Thomas Edison, 1879
Cotton gin, Eli Whitney, 1793
Telephone, Alexander Graham Bell, 1876
A.Let factories and homes keep working after dark
B.Cleaned cotton fast, which led planters to enslave even more people
C.Sent messages along wires in minutes instead of weeks
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 15 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 15. Prints on its own sheet.
1.1. Steel plow, John Deere, 1837 — C (Cut through thick prairie soil so farmers could plant more land) 2. Barbed wire, Joseph Glidden, 1874 — A (Fenced huge areas cheaply and closed the open range) 3. Airplane, Wright brothers, 1903 — D (Carried people and mail through the air) 4. Personal computer, 1970s — B (Let one office worker do tasks that once took many people)
2.1. Telegraph, Samuel Morse, 1844 — C (Sent messages along wires in minutes instead of weeks) 2. Light bulb, Thomas Edison, 1879 — A (Let factories and homes keep working after dark) 3. Cotton gin, Eli Whitney, 1793 — B (Cleaned cotton fast, which led planters to enslave even more people) 4. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances)
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.