Mind-mapping tool's visual "pop" will engage teens.
Effective approach to expand vocab with 40 free words.
No-frills app helps build vocabulary by focusing on roots.
An absorbing puzzle game with a cryptic message.
Awesome video creator presents some privacy concerns.
Focused drills for vocab building; no bells and whistles.
Mind-mapping tool lets kids easily create visual organizers.
Tricky user interface, iffy content in unpolished tool.
Fiery explosions and crashes in easy special-effects tool.
Functional, Euro-centric language app low on "wow" factor.
Cool, free interactive textbook teaches design in 3-D.
Uneven mini-games let kids grapple with mechanics concepts.
Great tour guide shows and explains nearby must-sees.
Collaborative whiteboard app can be fun, but watch privacy.
Interaction of Color by Josef Albers builds on the quality of the influential book on which it's based by adding interactive content, video commentaries, and other digital extras to appeal to budding color enthusiasts.
Create eye-catching presentations with images and few words.
Simplified interactive whiteboard has privacy issues.
Popular game genre gets fun twist with social features.
Awesome professional-level tool for digital artists.
Distasteful app glorifies violence.
Video tool built for sharing, collaborating; watch privacy.
Realistic, high-flying racer -- with lots of wrecks.
Brainstorm and organize on the go with virtual corkboard.
From Brunei to Barbados, complex app is all over the map.
Some violent imagery in stop-motion animation app.