Materials for K-12


Ray Troll Stratigraphic Timescale  Here's a great timescale for students by the wonderful artist and illustrator, Ray Troll. We've also included a short video clip of Ray and Kirk Johnson discussing stratigraphy over pancakes at breakfast, and as a special bonus we've added an mp3 of Ray's Ages of Rocks.

Lab Day 2009: This year, we utilized both an in-house Lab Day and our new mobile teaching lab to reach students in the Boston metropolitan area.

How Do We Measure Time? Curricula for grades 5-8 and 9-10 provide teachers with thoughtfully sequenced activities, investigations, video chapters, and readings to help students on their journey to understanding how Earth’s history has changed over billions of years. Dr. Kirk Johnson, Chief Curator and Vice President of Research and Collections at the Denver Museum of Nature & Science, and Dr. Samuel Bowring of the EARTHTIME Project at the Massachusetts Institute of Technology, are the scientists that students connect with as they work to develop the concepts of relative and absolute age. (22 Mb .pdf)

Lab Day: On April 29th 2008, thirty-seven students from three Boston-area high schools attended a day of workshops and discussion on geochronology at MIT. You can learn more about this program and view a webcast here. You can download the pdf of the Radioactive Decay and Dating lesson plan and the accompanying spreadsheet file. A kit for the exercise is available from EARTHTIME for free (beads, bingo chips, mixing bowl and measuring cup). For teachers: you can learn more here and view our new video with instructions for using the geochronology teaching kit. NOW!!! Holen Sie sich das Lesson Plan in Deutsch hier.

How Do You Measure Time?  This educational module, developed jointly with the Denver Museum of Nature and Science, describes in text and graphics how and why scientists use zircon crystals to measure time. The module contains six printable mini-posters.

Determining the Age of Things  These video clips, also developed jointly with the Denver Museum of Nature and Science, show how and why scientists determine the age of things. This module comprises seven video clips in Quicktime® format.


EARTHTIME is supported by the National Science Foundation.