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 5 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.
Telephone, Alexander Graham Bell, 1876
Personal computer, 1970s
Mechanical reaper, Cyrus McCormick, 1831
Barbed wire, Joseph Glidden, 1874
A.Harvested wheat many times faster than by hand
B.Fenced huge areas cheaply and closed the open range
C.Let one office worker do tasks that once took many people
D.Let people talk to each other over long distances
2.Draw a line from each one to its match.
Assembly line, Henry Ford, 1913
Airplane, Wright brothers, 1903
Refrigerated railroad car, 1870s
Light bulb, Thomas Edison, 1879
A.Let factories and homes keep working after dark
B.Carried people and mail through the air
C.Built cars step by step, cutting the time to make one
D.Carried fresh meat across the country without spoiling
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 5 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 5. Prints on its own sheet.
1.1. Telephone, Alexander Graham Bell, 1876 — D (Let people talk to each other over long distances) 2. Personal computer, 1970s — C (Let one office worker do tasks that once took many people) 3. Mechanical reaper, Cyrus McCormick, 1831 — A (Harvested wheat many times faster than by hand) 4. Barbed wire, Joseph Glidden, 1874 — B (Fenced huge areas cheaply and closed the open range)
2.1. Assembly line, Henry Ford, 1913 — C (Built cars step by step, cutting the time to make one) 2. Airplane, Wright brothers, 1903 — B (Carried people and mail through the air) 3. Refrigerated railroad car, 1870s — D (Carried fresh meat across the country without spoiling) 4. Light bulb, Thomas Edison, 1879 — A (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.