The Math Education faculty at Brigham Young University have created a series of videos to help teach. They are available at Math The World on Youtube. From the description:

 

Welcome to Math The World, a math project dedicated to bringing real life context to math! 

 

At Math The World, we are on a mission to answer the age-old student question, "When will I ever use this?" We're here to bridge the gap between theoretical math and real-life applications. Our videos take everyday questions and harness the power of mathematical modeling to provide insightful and meaningful answers.

 

What makes us different is we are a team of not just Mathematicians but Math Educators. So we don't just know the material but also how to teach it, the common pitfalls students make, and the pedagogy to help empower other teachers to improve their practice!