Milestones in medicine timeline: write the dates: timeline worksheet for Grade 12, page 1 preview

Timeline worksheet · Science

Milestones in medicine timeline: write the dates · Grade 12

Write the date of each of 7 events about milestones in medicine on a timeline using a date bank. Practices chronology and reading a scaled timeline.

Grade 12 · ages 17 to 18
Medium
10 to 15 minutes
1 page
Free

The answer key is a separate page for grown-ups. Sign in to download it.

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The events

Directions: Write the date of each event on its line. Use the dates in the box.

Dates
oldest newest
Edward Jenner tests the first vaccine, using cowpox to protect against smallpox.
René Laennec invents the stethoscope.
Ether anesthesia is demonstrated publicly during surgery in
Boston.
John Snow links a cholera outbreak to a contaminated water pump in London.
Wilhelm Röntgen discovers X-rays.
Jonas Salk's polio vaccine is declared safe and effective.
The Human Genome Project is completed.

What your child practices

Your child practices chronology and reading a scaled timeline.

Grades and ages: Grade 12, ages 17 to 18
Time: About 10 to 15 minutes
Subject: Science
Level: Medium for Grade 12
Answer key: Yes, for grown-ups who sign in
Printing: 1 page, US Letter or A4, low-ink option
Updated: October 15, 2026

How to use it

Try the first question together so the format is clear. Then let your child work through the rest, showing their thinking on the page. It is pitched at the expected level for Grade 12, for practice after the topic has been taught.

An answer key comes with it as a separate page that grown-ups download after signing in.

Tip for grown-ups: Find the oldest and newest events first, then fill in the middle.

Done on paper? A grown-up can record it on the child's page in PlayOwl; downloading alone doesn't count as finished.