While research continues, many schools are approaching kids who might have problems earlier through a strategy known as "responsive intervention" rather than waiting for them to fail, says Dixon Deutsch, executive director of NYC Charter School Center's Special Education Collaborative.

WSJ: ADHD Warning Signs and Kids: Growing Pains or Cause for Concern?

The dual touch-sensitive jog wheels on the KONTROL S4 hardware offer extremely precise and responsive deck control due to a new patent-pending electromagnetic technology, complemented through Native Instruments' high-resolution NHL protocol that provides superior performance over conventional MIDI.

ENGADGET: Traktor Kontrol S4 hardware interface set to make the scene this winter