The girl takes Cora through various math problems set up through iReady, an individualized online math and reading intervention program built for Common Core.

Baltimore City Schools uses iReady assessments to help gauge at which grade level a student is performing in math and reading. The scores are not made public without being redacted.

At Patterson High School, 575 students took the iReady math assessment, but just 17 of those students tested at algebra and geometry level math, which are courses required to graduate.