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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 20 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: How Penicillin Was Found

In 1928 Alexander Fleming went on holiday and left a stack of dishes on a bench. Each held a colony of bacteria. When he came back, one dish had a spot of mould on it. Around the mould was a clear ring where the bacteria had died. Fleming realised the mould was producing something that killed bacteria. He named it penicillin and published a paper. Almost nobody noticed. Ten years later, Howard Florey and Ernst Chain read that paper and tried to make penicillin in quantity. That turned out to be the hard part: it took two thousand litres of mould fluid to treat one patient. By 1944 the problem had been solved and penicillin was reaching soldiers in the field.

  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: The Accidental Photograph

In 1895 Wilhelm Röntgen was working with a covered tube in a darkened room when he noticed a screen across the laboratory glowing. Something was passing through the cover and crossing the room. He did not know what it was, so he called it X — the unknown. He spent seven weeks alone in the laboratory testing it. He put wood, rubber and metal in the way. Metal stopped it; the rest did not. Then he asked his wife to put her hand between the tube and a photographic plate. The picture showed the bones of her hand and her wedding ring. Within a year, X-rays were being used in hospitals. Röntgen refused to patent them.

  1. 1. How is it different from the X-ray story?
  2. 2. How is this discovery like the discovery of X-rays?
  3. 3. How did the two discoveries differ in what happened next?

LessonPrint · RI.4.9 · Set 20 · free to copy for classroom use

Answer key — Integrate Two Texts

Set 20. Prints on its own sheet.

  1. 1.1. Discovering penicillin was only the start — the details about Florey, Chain and two thousand litres show that making it usable was the real work.
  2. 2.1. Penicillin needed sixteen years and other scientists to become useful; X-rays were useful almost at once. 2. Both were noticed by accident by somebody paying attention to something unexpected. 3. X-rays reached hospitals within a year; penicillin took sixteen years and two more scientists.

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.