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 22 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.
Airplane, Wright brothers, 1903
Personal computer, 1970s
Telegraph, Samuel Morse, 1844
Barbed wire, Joseph Glidden, 1874
A.Let one office worker do tasks that once took many people
B.Fenced huge areas cheaply and closed the open range
C.Carried people and mail through the air
D.Sent messages along wires in minutes instead of weeks
2.Draw a line from each one to its match.
Mechanical reaper, Cyrus McCormick, 1831
Steel plow, John Deere, 1837
Telephone, Alexander Graham Bell, 1876
Cotton gin, Eli Whitney, 1793
A.Cleaned cotton fast, which led planters to enslave even more people
B.Harvested wheat many times faster than by hand
C.Cut through thick prairie soil so farmers could plant more land
D.Let people talk to each other over long distances
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 22 · free to copy for classroom use
Answer key — Machines That Changed American Work
Set 22. Prints on its own sheet.
1.1. Airplane, Wright brothers, 1903 — C (Carried people and mail through the air) 2. Personal computer, 1970s — A (Let one office worker do tasks that once took many people) 3. Telegraph, Samuel Morse, 1844 — D (Sent messages along wires in minutes instead of weeks) 4. Barbed wire, Joseph Glidden, 1874 — B (Fenced huge areas cheaply and closed the open range)
2.1. Mechanical reaper, Cyrus McCormick, 1831 — B (Harvested wheat many times faster than by hand) 2. Steel plow, John Deere, 1837 — C (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. Cotton gin, Eli Whitney, 1793 — A (Cleaned cotton fast, which led planters to enslave even more people)
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.