Marisa Perezchica circles her classroom, classical music softly streaming from her iPad, as her sixth-graders take a practice test on their own iPads.
Students work out factoring problems on paper or on their tablets before typing in the answers.
Perezchica stops at several desks, answering questions or explaining concepts.
In another corner, a student who has finished the practice test has moved ahead to the next concept and is watching an animation explaining how to solve a simple algebraic equation.