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 10 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.
Cotton gin, Eli Whitney, 1793
Telephone, Alexander Graham Bell, 1876
Barbed wire, Joseph Glidden, 1874
Airplane, Wright brothers, 1903
A.Cleaned cotton fast, which led planters to enslave even more people
B.Let people talk to each other over long distances
C.Fenced huge areas cheaply and closed the open range
D.Carried people and mail through the air
2.Draw a line from each one to its match.
Steel plow, John Deere, 1837
Telegraph, Samuel Morse, 1844
Personal computer, 1970s
Light bulb, Thomas Edison, 1879
A.Let one office worker do tasks that once took many people
B.Let factories and homes keep working after dark
C.Cut through thick prairie soil so farmers could plant more land
D.Sent messages along wires in minutes instead of weeks
3.The assembly line let workers build cars much faster. Predict an invention that could help factory workers produce more in the future, and explain how.
I explained what the assembly line changed.
I described my invention.
I explained how it would help workers produce more.
LessonPrint · D2.Eco.13.3-5 · Set 10 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 10. Prints on its own sheet.
1.1. Cotton gin, Eli Whitney, 1793 — A (Cleaned cotton fast, which led planters to enslave even more people) 2. Telephone, Alexander Graham Bell, 1876 — B (Let people talk to each other over long distances) 3. Barbed wire, Joseph Glidden, 1874 — C (Fenced huge areas cheaply and closed the open range) 4. Airplane, Wright brothers, 1903 — D (Carried people and mail through the air)
2.1. Steel plow, John Deere, 1837 — C (Cut through thick prairie soil so farmers could plant more land) 2. Telegraph, Samuel Morse, 1844 — D (Sent messages along wires in minutes instead of weeks) 3. Personal computer, 1970s — A (Let one office worker do tasks that once took many people) 4. Light bulb, Thomas Edison, 1879 — B (Let factories and homes keep working after dark)
3.Explains that the assembly line let workers build cars faster, then describes a future invention for factory workers and how it would help them produce more.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.