In order to save Poddleville, Jackie and Annie need to figure out the pattern for the podlock before Hacker and his henchmen. They take the back entrance to the vault and attempt to unlock it from there. After some thinking and discussion with Matt and Inez, Jackie figures out the pattern and enters the vault, saving Poddleville from Hacker.

High school teacher Mr. Jaime Escalante teaches his students about negative and positive numbers. He uses a real-world example of digging into sand at the beach to help students understand the concept.

Sad Man and Bad Man both illustrate that calculating the fraction of a whole number is the same as dividing by the denominator. Bad Man then challenges Amber and Ashley to match fractions with their equivalent divisions, and they complete the challenge successfully.

Mr. Finn sings to his class a song about math. His song includes a few simple subtraction and multiplication prompts.

Nick explains what a prime number is and determines that the serial killer commits a murder on dates in the month that are prime numbers.