We are currently developing the online version of our math curriculum. Here is a sample lesson: Finding the area of a circle A circle is a collection of points a certain distance (its radius) from another point, its center. The area of the circle is all of the space inside of it. To find the area: Take the radius (r) of a circle (the distance from the circle’s center to any point on the circle itself) Square it Multiply by π (the Greek letter pi, pronounced “pie,” is an irrational number that’s a bit more than 3: round pi to… Learn more

## Category: Explore Math

## Lesson: Negative and Positive Numbers (Introduction)

Physical Oceanographer Emmanuel Boss enjoys spending time at sea level (elevation 0) and his work takes him into the ocean. To understand how he does that, we need to understand: Integers in Real-World Contexts — 5 and + 5 look similar, but they are very different numbers. They are opposites and the difference between them is 10! +5 is the number 5 you have worked with since learning to count. It’s 5 units above zero (0). Negative five (- 5) is five units below zero. Positive and negative numbers can tell you how much money you have or you owe. If… Learn more

## Teacher Resources for Negative and Positive Numbers (Introduction)

Grade level designed for: 6 Common Core Standards covered in Module: CCSS.MATH.CONTENT.6.NS.C.5 / C.6 — including 6.A, 6.B 6.C / C.7 – including 7.A, 7.B, 7.C, 7.D / C.8 STEM Professional Featured: Physical Oceanographer Emmanuel Boss enjoys spending time at sea level (elevation 0) and his work takes him into the ocean. Additional STEMps Included: Civil Engineer Tysheina Robertson Earth Systems Scientist Charles Zender Software Engineer Malik Coates Guiding Questions What are negative numbers? What are positive numbers? How can we use negative and positive numbers to describe money, locations on Earth’s surface, elevation, and… Learn more