Credit Cards and Building Credit on Purpose
Aligned to JS:CD-3 — Jump$tart National Standards in K-12 Personal Finance Education & Advance CTE Career Clusters.
What this lesson teaches
A credit card is a short-term loan you take every time you use it. Paid in full each month, it costs nothing and builds your credit history. Carried from month to month, it charges some of the highest interest in consumer finance. The card is not the problem; the balance is.
Worked examples
Example 1
Charge $300 and pay $300 by the due date: you pay no interest and the on-time payment is reported, which builds your score.
Example 2
Carry that $300 at 26% APR while paying $30 a month and it takes about 11 months and costs roughly $40 in interest for nothing.
Example 3
A secured card, where you put down a deposit that becomes your limit, is how people with no history start. Six months of on-time payments usually opens the door to a regular card.
Practice questions
- Explain how to use a credit card so it costs you nothing.
- Calculate one month of interest on a $600 balance at 24% APR.
- How could someone with no credit history start building one?
Watch the lesson
Every lesson comes with a video taught in English and Spanish — the same video the QR code in the printed workbook opens.
▶ Watch this lessonEn español
Tarjetas de crédito y construir crédito a propósito
Una tarjeta de crédito es un préstamo a corto plazo que tomas cada vez que la usas. Pagada completa cada mes, no cuesta nada y construye tu historial. Arrastrada de un mes a otro, cobra algunos de los intereses más altos que existen. La tarjeta no es el problema; el saldo sí.
Ejemplo 1: Cargas $300 y pagas $300 antes de la fecha límite: no pagas intereses y el pago puntual se reporta, lo que construye tu puntaje.
Ejemplo 2: Arrastra esos $300 al 26% de APR pagando $30 al mes y tarda unos 11 meses y cuesta cerca de $40 de intereses a cambio de nada.
Ejemplo 3: Una tarjeta asegurada, donde dejas un depósito que se vuelve tu límite, es como empiezan quienes no tienen historial. Seis meses de pagos puntuales normalmente abren la puerta a una tarjeta normal.
More Credit & Debt lessons
Teach this lesson today
An AI tutor that guides with questions instead of just giving answers — all K–12 core subjects, every child in the family.
Start free — no card required