A tactical droid from Star Wars. Those of you who have seen Star Wars: The Clone Wars may remember TX-20 saying this line.

Included on the droid's chalkboard:
Magearna from Pokemon
The X Tornado from Sonic X
A 3DS
The angle totals of a triangle and square
The Pythagorean theorem
The formula for the circumference of a circle(radius)

Tactical Droid - Star Wars