8.NS.A.1

Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.

 
13 Lesson(s)
   

Irrational (and Other!) Numbers on the Number Line

Algebra I » Unit: The Number Line Project
Algebra I » Unit: The Number Line Project
James Dunseith
Worcester, MA
Environment: Urban
 
Big Idea:

In addition to continuing with their work, students learn one of my favorite closing structures: appreciations!

 
Favorites (40)
 
Resources (20)
u1l15 misconception fractions on number line resized
   

Exponents and Radicals Unit Assessment Day 1 of 2

8th Grade Math » Unit: Exponents and Radicals
8th Grade Math » Unit: Exponents and Radicals
Christa  Lemily
Bowling Green, KY
Environment: Suburban
 
Big Idea:

Assess mastery of exponents, radicals, and scientific notation through a variety of high level questions

 
Favorites (3)
 
Resources (9)
test analysis lessom image
   

Units and Vast Systems of Measurement

8th Grade Math » Unit: Scale of the Universe: Fluency and Applications
8th Grade Math » Unit: Scale of the Universe: Fluency and Applications
Shaun Errichiello
New York, NY
Environment: Urban
 
Big Idea:

We can use our intuition and understanding of exponents and scientific notation to decipher the units in any system of measurement.

 
Favorites (4)
 
Resources (13)
images 1
   

Rational or Irrational (Day 1 of 2)

8th Grade Math » Unit: Number Sense
8th Grade Math » Unit: Number Sense
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Every number expands infinitely. The repeating digit may be zero, which means the number terminates, or another digit pattern.

 
Favorites (25)
 
Resources (9)
 
Reflections (1)
image rational irrational
   

Rational or Irrational (Day 2 of 2)

8th Grade Math » Unit: Number Sense
8th Grade Math » Unit: Number Sense
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Every number expands infinitely. The repeating digit may be zero, which means the number terminates, or another digit pattern.

 
Favorites (19)
 
Resources (13)
 
Reflections (1)
image rational irrational
   

Day Four & Five

8th Grade Math » Unit: Welcome Back!
8th Grade Math » Unit: Welcome Back!
Heather Sparks
Oklahoma City, OK
Environment: Urban
 
Big Idea:

To help guide instruction for the year and establish a baseline for quarterly benchmark assessments, students will take a benchmark test aligned to the CCSS.

 
Favorites (12)
 
Resources (8)
 
Reflections (1)
graph
   

Operation Rational Irrational Numbers

8th Grade Math » Unit: Relationships between Quantities/Reasoning with Equations
8th Grade Math » Unit: Relationships between Quantities/Reasoning with Equations
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Real numbers are either rational or irrational. But do we know the nature of sums and products of these real numbers?

 
Favorites (36)
 
Resources (14)
operation image
   

Round Robin Review (Unit 1)

8th Grade Math » Unit: Number Sense
8th Grade Math » Unit: Number Sense
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Tackling questions in Round Robin fashion is a great way to review and practice for standardized exams.

 
Favorites (3)
 
Resources (13)
 
Reflections (1)
kagan
   

What's Rational About That? Day 3

8th Grade Math » Unit: So What's Rational About That?
8th Grade Math » Unit: So What's Rational About That?
Heather Sparks
Oklahoma City, OK
Environment: Urban
 
Big Idea:

Students will get practice truncating the decimal expansions of non-perfect square numbers in order to accurately place them on a number line.

 
Favorites (3)
 
Resources (11)
 
Reflections (1)
pic
   

What's Rational About That? Day 4

8th Grade Math » Unit: So What's Rational About That?
8th Grade Math » Unit: So What's Rational About That?
Heather Sparks
Oklahoma City, OK
Environment: Urban
 
Big Idea:

Often times, students need several exposures to material before it begins to sink in. Today, we will play an online sorting game in teams to provide that needed practice identifying rational and irrational numbers before manipulating them mathematically.

 
Favorites (4)
 
Resources (12)
 
Reflections (1)
rat and irrat online game
   

What's Rational About That? Day 5

8th Grade Math » Unit: So What's Rational About That?
8th Grade Math » Unit: So What's Rational About That?
Heather Sparks
Oklahoma City, OK
Environment: Urban
 
Big Idea:

Today's activity will give students the opportunity to solidify their understanding of rational and irrational numbers by creating sorting cards for their partners. This activity will serve as a quiz review.

 
Favorites (4)
 
Resources (13)
 
Reflections (1)
pigraphic
   

Formative Assessment: Scientific Notation

8th Grade Math » Unit: How Big? How Small?
8th Grade Math » Unit: How Big? How Small?
Heather Sparks
Oklahoma City, OK
Environment: Urban
 
Big Idea:

Students will demonstrate their knowledge on this formative assessment covering the major concepts of scientific notation including expressions and operations.

 
Resources (9)
 
Reflections (1)
hands
   

Adding and Subtracting in Scientific Notation

8th Grade Math » Unit: Scale of the Universe: Fluency and Applications
8th Grade Math » Unit: Scale of the Universe: Fluency and Applications
Shaun Errichiello
New York, NY
Environment: Urban
 
Big Idea:

Place value can help us quickly add and subtract numbers in scientific notation

 
Favorites (4)
 
Resources (7)
strings for addition
Common Core Math
 
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