##### Stand and Deliver: Teach Algebra
• Math → Real World Application → Algebra
• Math → Algebra → Negative Numbers

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.

#### Public Discussion Questions

1. Give a real world example of using positive and negative numbers.
2. Explain how a negative plus a positive of the same number equals zero.

#### Standards

• ##### CCSS.MATH.CONTENT.6.NS.C.5
Common Core State Standards
Understand that positive and negative numbers are used together to describe quantities having opposi...
• ##### CCSS.MATH.CONTENT.7.NS.A.1
Common Core State Standards
Apply and extend previous understandings of addition and subtraction to add and subtract rational nu...
• ##### CCSS.MATH.CONTENT.7.NS.A.1A
Common Core State Standards
Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has...
• ##### CCSS.MATH.CONTENT.8.G.A.3
Common Core State Standards
Describe the effect of dilations, translations, rotations, and reflections on two-dimensional figure...
• ##### CCSS.MATH.CONTENT.HSA-APR.B.3
Common Core State Standards
Identify zeros of polynomials when suitable factorizations are available, and use the zeros to const...
• ##### CCSS.MATH.CONTENT.HSF-BF.B.4
Common Core State Standards
Find inverse functions.

#### Public Pause Prompts

Start Time Prompt Timing Length
01:35 What does the sand that comes out of the hole represent in Algebra? Timed 01:00