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 14 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.
Assembly line, Henry Ford, 1913
Steel plow, John Deere, 1837
Telephone, Alexander Graham Bell, 1876
Mechanical reaper, Cyrus McCormick, 1831
A.Cut through thick prairie soil so farmers could plant more land
B.Built cars step by step, cutting the time to make one
C.Harvested wheat many times faster than by hand
D.Let people talk to each other over long distances
2.Draw a line from each one to its match.
Cotton gin, Eli Whitney, 1793
Airplane, Wright brothers, 1903
Barbed wire, Joseph Glidden, 1874
Light bulb, Thomas Edison, 1879
A.Let factories and homes keep working after dark
B.Carried people and mail through the air
C.Fenced huge areas cheaply and closed the open range
D.Cleaned cotton fast, which led planters to enslave even more people
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 14 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 14. Prints on its own sheet.
1.1. Assembly line, Henry Ford, 1913 — B (Built cars step by step, cutting the time to make one) 2. Steel plow, John Deere, 1837 — A (Cut through thick prairie soil so farmers could plant more land) 3. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances) 4. Mechanical reaper, Cyrus McCormick, 1831 — C (Harvested wheat many times faster than by hand)
2.1. Cotton gin, Eli Whitney, 1793 — D (Cleaned cotton fast, which led planters to enslave even more people) 2. Airplane, Wright brothers, 1903 — B (Carried people and mail through the air) 3. Barbed wire, Joseph Glidden, 1874 — C (Fenced huge areas cheaply and closed the open range) 4. Light bulb, Thomas Edison, 1879 — A (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.