Class technician Emily (center) explains the 3D computer to the new tech team in training at PS 97 in Bensonhurst.

Teacher Kate Hagan presides over the classroom economy she has created using items generated by the computer.

The price list for the products generated by the 3D computer.

The 3D computer prints out the geometric forms that 8th-grade math students will use to measure volume.

Customers line up to have their accounts checked and do some shopping.

IS 303 8th-grader Anna puts together a cube net before making her calculation.

Math teacher Sally-Ann Bongiovanni.