Playground Physics

Fun video app lets students track motion to explore physics concepts
Bottom Line: This is a cheap way to get students out of their chairs to make physics real and tangible, empowering learners and encouraging curiosity.
Educreations

Easy-to-use iPad app aimed at recording whiteboard instruction
Bottom Line: While many other whiteboard tools offer endless -- and often overwhelming -- options, this app is usefully refined and could be that "just right" experience for many.
Google Earth

Dazzling globe-trotting tool has endless classroom applications
Bottom Line: This tool defines engagement and offers a completely open-ended experience perfect for use across the educational spectrum.
NASA Visualization Explorer

Updated stories help kids stay up to speed with space exploration
Bottom Line: Weekly updates and striking visuals make it easy for kids to stay informed about NASA's most recent discoveries.
Paper by WeTransfer

Beautifully designed digital sketchbook for any age
Bottom Line: The simplicity and effectiveness of the app make this a powerful sketch and note-taking tool for the iPad.
Photoshop Express Photo Editor

Top-notch photo editor helps perfect pics for creative projects
Bottom Line: This is a powerful, free creation tool from the industry leader in photo editing.
Microsoft OneNote

Note-taking giant built for flexible, collaborative work
Bottom Line: A powerful (and free) tool for thinking and organization that's making smart strides in the education space.
Sway

Create dynamic visual presentations on flexible storytelling platform
Bottom Line: A seamless transition from design to presentation makes Sway a great fit for presenting carefully curated content.
Arduino Science Journal

Turn your phone into a lab sensor to collect and analyze data
Bottom Line: Science Journal does a good job recording real-time motion, sound, and light data using phones.