Via Free Technology for Teachers and Richard Byrne: "Dictionary Bubble is a free Chrome extension that provides definitions and synonyms for any word that you double-click in an online article. The extension will also provide an audio pronunciation of the words on which you double-click."

As the title suggests, this site provides one or two sentence descriptions and large annotated screenshots of some of the best and most popular Chrome apps and extensions out there. With these tools you can turn your browser into a powerhouse application. Take a look! Some of my favorites are the Diigo Web Collector, Save to Google Drive, and Readability.

100+ Best Chrome Apps and Extensions http://t.co/biDmSpMNVR - John Robinson (@21stprincipal) October 12, 2013

The National Young Arts Foundation has collaborated with Teachers College Columbia University to create a study guide based on the HBO MasterClass series. Pursuing Your Passions is a study guide can be used in various K-12 educational settings and it offers educators a chance to embrace arts education in the classroom. Interested educators can access all the lessons and multimedia elements on the project's website and also request a free DVD copy of the study guide and the entire first season of the Emmy nominated HBO MasterClass.

From @NCTM, these math challenges are designed to bring mathematical thinking to the dinner table for families.  Teachers will also find many of these problems valuable to tackle with students to support problem solving skills and mathematical practices.  The challenges are also available in Spanish.

Educators share their stories about becoming "Connected Educators" in this Edutopia community forum.

In this video from the Teaching Channel, you will see teachers demonstrating the strategies they use to help student engage effectively in a range of collaborative discussions (one-on-one, in groups, and teacherled) with diverse partners on grade 6 topics, texts, and issues, building on others'€™ ideas and expressing their own clearly.

Executive function stimulation: include questions in homework and tests that require mathematics communication. via Feedly

6 Days and 78 Resources for Digital Literacy Internet Safety There are links to great examples of resources that can be used to teach kids how to stay safe online and develop digital literacy

via Education Week (@educationweek) September 17, 2013

Readworks.org is a reputable source of excellent lesson plans and reading passages focused on teaching reading comprehension.  This fall, they are developing over 1000 new CCSS aligned and Lexile-leveled non-fiction and literary passages and question sets.  This free resource will be an excellent supplement for teachers.

"The David Rumsey Historical Map Collection is often the first place I go to when looking for old maps to use in a social studies lesson. The collection contains more than 100,000 historical maps documenting places throughout the world. " via Feedly Collections of Historical Maps and Ideas for Using Them In Your Classroom via Free Technology for Teachers http://www.freetech4teachers.com/

How to Insert Videos Into Google Forms via Free Technology for Teachers http://www.freetech4teachers.com/

Navigating Text Complexity. The Council of Chief State School Officers provides a wonderful set of resources for understanding how text complexity is defined in the Common Core State Standards and a set of tools for analyzing text and using texts effectively in the classroom. Check it out!

40 Ways to Use Google Apps in the Classroom - Google Drive via Best content in educators | Diigo - Groups https://groups.diigo.com/group/educators A great presentation chock-a-block with great ideas for how to use Google Apps in the classroom.

Free Technology for Teachers: 5 Good Places for Students to Find Public Domain Images via Best content in Diigo In Education | Diigo - Groups https://groups.diigo.com/group/diigoineducation

An interactive infographic looks at the use of calculators with Common Core Exams.