"Student-centric tools" are educational tools that are largely under the control of the student. The student directs the investigation, developing his or her own questions and pursuing them with appropriate support from the teacher. Knowledge is constructed through the investigation process.

See also:

Constructivism
Inquiry-based learning

Constructionism
Web 2.0

Some tools to explore:

Voki
Voicethread
Blabberize
Glogster
Museum Box
Xtranormal
Makebeliefs Comix
Storybird