Geo Walk/IPad
Geo Walk is an app that explores facts about the world. It suits both adults and children curious about far away places, people, and  living creatures and plants. The Geo Walk app has  articles that are gathered into one place. Spin the globe to choose a place and read all about it. The application has 3 main categories to browse through: Places, Flora and Fauna, and People. All entries are provided with colorful pictures that can be viewed in a cover-flow or chosen object mode.

Storia/IPad
Storia is an interactive educational reading app that has eBooks that can be assigned automatically to a designated bookshelf, or manually to any other of your choice. I haven't used this yet, but I'm acquiring points to collect free e-books and am signing up to use this app on a classroom Ipad that I'm hoping to get through a grant. I really want to get a set of Kindles and use this app for book clubs.

Google Earth
With Google Earth you can take a virtual journey to any location in the world.  You can explore 3D buildings, imagery, and terrain.  Since part of the 4th grade science curriculum includes learning about space technology, we can use Google Earth to view images shared by NASA just hours ago in the Live from Mars layer or view 3D rover models and follow their tracks to see high-resolution 360-degree panoramas. This helps the students to make real-life connections to what they're learning about.

You Tube
I use You Tube all the time to show video demonstrations of concepts that we are discussing in class. It's useful to watch short lessons or mini lessons that given by other teachers.  You can use YouTube videos to enrich your classroom lessons and initiate discussion. It's an excellent resource to use for front-loading activities when introducting new units of material.