English to Spanish Science Mathematics & Statistics Libros de texto de mates

De la misma entrevista a un editor de libros de texto. Sé que está hablando de matemáticas pero no le encuentro suficiente contexto para adivinar el significado. Dice:

"Now, what do you expect? Students used to learn about acids and bases in science class, about curls in math and about international trade in economics. Now they'll be learning about Mentos-Coke reactions in science class, about negative calories in math and about the Big Mac index in economics. That's not where we want to go."