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Self-Correct as You Read is a free printable Grade 4 English worksheet on going back over an information text to fix understanding, aligned to Common Core standard RF.4.4. It prints 2 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 12 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

Self-Correct as You Read

RF.4.4

NameDate

Read the text, then answer the questions.

1.Read the text, then answer the questions.

The Longitude Problem

A ship's latitude — how far north or south it is — can be found from the height of the sun at noon. Sailors could do that for centuries. Longitude, how far east or west, was the problem. It has no natural marker. The solution was known in principle: compare the time on board with the time at a fixed place. The Earth turns fifteen degrees an hour, so every hour of difference is fifteen degrees of longitude. That required a clock that stayed accurate on a rolling, salty, temperature-swinging ship. No such clock existed. John Harrison, a carpenter, spent forty-three years building four. The fourth, finished in 1759, was the size of a large pocket watch and lost five seconds in eighty-one days at sea.

  1. 1. What does "accurate" mean in this text?
  2. 2. How could sailors find their latitude?
  3. 3. How many degrees does the Earth turn in an hour?
  4. 4. What is "longitude"?
2.Read the text, then answer the questions.

What a Coral Reef Is

A coral reef looks like rock and is built by animals. A coral polyp is a soft creature the size of a pinhead. It draws calcium from the sea water and builds a hard cup around itself. Millions of polyps, cup upon cup, become a reef. Inside each polyp live tiny algae. The algae make food from sunlight and pass most of it to the polyp. In exchange they get shelter and the polyp's waste. Neither could build a reef alone. When the water gets too warm, the polyps expel the algae. Without them the coral turns white and starves. That is what bleaching means. A reef takes centuries to build and can bleach in a single hot summer.

  1. 1. What does the polyp draw from the sea water?
  2. 2. What does "expel" mean here?
  3. 3. What does "bleaching" mean in this text?
  4. 4. What happens when the water gets too warm?

LessonPrint · RF.4.4 · Set 12 · free to copy for classroom use

Answer key — Self-Correct as You Read

Set 12. Prints on its own sheet.

  1. 1.1. Keeping the correct time without drifting. 2. From the height of the sun at noon. 3. Fifteen. 4. How far east or west a place is.
  2. 2.1. Calcium. 2. Push out — the polyps force the algae out. 3. Coral turning white and starving after losing its algae. 4. The polyps expel the algae, and the coral turns white and starves.

Last reviewed 2026-09-05. Aligned to RF.4.4 of the Common Core State Standards for English language arts.