June 2015 - Vol. 58 No. 6
![June 2015 issue cover image](https://cacm.acm.org/wp-content/uploads/2015/06/2783419.cover_.jpg?w=302)
Features
A Celebration of Accomplishments
To Learn CS Principles, Start in the Cafeteria Line
Bringing Evidence-Based Education to CS
Estonia: A Model For E-Government
An Interview with U.S. Chief Technology Officer Megan Smith
The Science of Managing Data Science
Evaluation Without Ground Truth in Social Media Research
Colored Petri Nets: A Graphical Language For Formal Modeling and Validation of Concurrent Systems
Turing Lecture: The Computer Science of Concurrency: The Early Years
Future Internets Escape the Simulator
Technical Perspective: Virtual Reality in Your Living Room
Illumiroom: Immersive Experiences Beyond the TV Screen