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 17 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
Cotton gin, Eli Whitney, 1793
A.Let people talk to each other over long distances
B.Cleaned cotton fast, which led planters to enslave even more people
C.Cut through thick prairie soil so farmers could plant more land
D.Built cars step by step, cutting the time to make one
2.Draw a line from each one to its match.
Barbed wire, Joseph Glidden, 1874
Refrigerated railroad car, 1870s
Personal computer, 1970s
Light bulb, Thomas Edison, 1879
A.Fenced huge areas cheaply and closed the open range
B.Carried fresh meat across the country without spoiling
C.Let factories and homes keep working after dark
D.Let one office worker do tasks that once took many people
3.The telegraph and the telephone changed how people send messages. Predict how people might send messages in the future, and explain one good and one bad effect.
I described a future way to send messages.
I gave one good effect.
I gave one bad effect.
LessonPrint · D2.Eco.13.3-5 · Set 17 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 17. Prints on its own sheet.
1.1. Assembly line, Henry Ford, 1913 — D (Built cars step by step, cutting the time to make one) 2. Steel plow, John Deere, 1837 — C (Cut through thick prairie soil so farmers could plant more land) 3. Telephone, Alexander Graham Bell, 1876 — A (Let people talk to each other over long distances) 4. Cotton gin, Eli Whitney, 1793 — B (Cleaned cotton fast, which led planters to enslave even more people)
2.1. Barbed wire, Joseph Glidden, 1874 — A (Fenced huge areas cheaply and closed the open range) 2. Refrigerated railroad car, 1870s — B (Carried fresh meat across the country without spoiling) 3. Personal computer, 1970s — D (Let one office worker do tasks that once took many people) 4. Light bulb, Thomas Edison, 1879 — C (Let factories and homes keep working after dark)
3.Predicts a future way to send messages, linked to the telegraph or telephone, with one good effect and one bad effect explained.
Last reviewed 2026-09-05. Aligned to D2.Eco.13.3-5 of the C3 Framework for Social Studies State Standards.