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Integrate Two Texts is a free printable Grade 4 English worksheet on using two texts together to write about a subject, aligned to Common Core standard RI.4.9. 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 15 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.

Integrate Two Texts

RI.4.9

NameDate

Read Text 1 and answer the question under it.

1.Read Text 1 and answer the question under it.

Text 1: 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. Determine the main idea of this text and explain how key details support it.
2.Now read Text 2 and answer these questions about BOTH texts.

Text 2: Lichen

A lichen is not one organism. It is a fungus and an alga living as one body. The fungus provides the structure and holds water. The alga photosynthesises and makes sugar. Separated, the fungus starves and the alga dries out. Because it needs no soil, a lichen can grow on bare rock, on gravestones and on the roofs of cars that have not moved for a decade. Lichens grow extremely slowly — some crustose species less than a millimetre a year. Scientists use that rate to date rock surfaces, a method called lichenometry. Lichens also absorb whatever is in the air. Where the air is dirty, they disappear, which makes them a living measure of pollution.

  1. 1. How is a lichen like a coral?
  2. 2. How is a reef different from a rock?
  3. 3. How is the coral partnership like the one in a lichen?

LessonPrint · RI.4.9 · Set 15 · free to copy for classroom use

Answer key — Integrate Two Texts

Set 15. Prints on its own sheet.

  1. 1.1. A reef is built by a partnership of two organisms — supported by the exchange between polyp and algae and by what bleaching is.
  2. 2.1. Both are partnerships in which an alga makes the food and the partner provides the structure. 2. A reef looks like rock but is built by living animals, cup upon cup. 3. Both are two organisms living together where each supplies what the other cannot make.

More practice for RI.4.9

Combine two texts on one topic to write about it properly.

Teaching this next? Integrating Information From Two Texts is the 40-minute plan for it, with the misconceptions to expect.

All Grade 4 worksheets

Last reviewed 2026-09-05. Aligned to RI.4.9 of the Common Core State Standards for English language arts.