Thursday, April 25, 2019

Google Earth Timelapses and Historical Imagery

Google Earth Pro (the desktop version of Google Earth) has offered historical imagery for many years. You can access that imagery by selecting the timeslider icon in the menu at the top of Google Earth when it is open on your desktop. Today, Google unveiled some updates to their Google Earth Engine Timelapse website that offers historical imagery in an online version of Google Earth. The timelapses are animations that play 35 years of satellite imagery. In the following video I demonstrate how to access the timelapses and the historical imagery in Google Earth.

Applications for Education
The timelapse and historical imagery could be useful in a science class to help students see how coastlines and other features of landscapes change over time.

This is a Copyright Infringement

If you have been following my blog for more than a few months, you're probably already familiar with my ongoing battle against copyright infringers all around the world. I recently took the step to truncate all of my RSS feeds which has helped in substantially cutting down on the number of sites publishing my work without permission. There are still some sites that feel it is okay to copy and paste my entire blog posts and then just add "source: Free Technology for Teachers" at the end. That's like a student copying an entire Wikipedia article into a document and passing it in as an essay with a one-item bibliography listing Wikipedia. No teacher would accept that essay and no blogger should accept similar behavior from a website. That's why I made the following video to explain the problem, how to properly re-use a person's work, and to call out the latest website to steal my work.

Learn more about copyright issues as they relate to education and blogging in this 2017 post in which I included the recording of a webinar that Beth Holland and I hosted on the topic.

ReadWorks Offers a Split Screen to Help Students Complete Assignments

ReadWorks is a free service that provides high-quality articles and lesson plans for K-12 ELA teachers. Every article on ReadWorks is accompanied by a lexile score and a suggested grade level. Any article that you select will also be accompanied by a list of key vocabulary terms and suggested questions to give to your students.

ReadWorks offers you the option to create an online classroom by either importing your Google Classroom roster or by manually entering students' names. Either option will give you the ability to assign articles and questions to your students. Students then sign-in to read their assigned articles and answer questions. A relatively new-to-me option provides students with the ability to split their screens in ReadWorks in order to have the questions and articles appear side-by-side. Watch my new video to see how that works. - Search and Share Resources by Standard is a free social network for finding and sharing free teaching materials according to Common Core standard or keyword. Resoures that you find through list the standards that can be addressed as well as some suggestions for using through resources in your classroom. You will find videos, PDFs, PowerPoint presentations, and Word Documents on uses a clean and simple user interface. When you first go to the site you will be greeted by a grid of recently shared resources. On that same page you can begin searching for resources by entering a keyword or by entering a Common Core standard. Search results are displayed in a grid format with large previews of each resource. You will have to create a free account on in order to download or save any resources.

You can register for a free account by using any verifiable email address. Once you have registered you will be able to bookmark and download resources. Depending upon the restrictions that a contributor to sets for his or resources, you may have to send a friend request before you can access his or her resources. You can add your own resources to by going to your account contents page and clicking on the add button to upload resources, write descriptions of your resources, and to link to external resources.

Applications for Education could become a great place to find new instructional materials according to Common Core standard. I kind of look at like if Teachers Pay Teachers without the selling and with an easy way to find resources according to standards.

Disclosure: is currently running a banner advertisement on the homepage of