April 2, 2015
Objective: SWBAT........

This week, students continue Number Worlds, Level E, Addition. Students will explore when and why to estimate sums as well as several methods for estimation.

• Students review skils learned this week and complete the weekly assessment.

3.OA.8 Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

Vocabulary:

• Addition
• Double Fact
• Near Double Fact
• Nice Numbers
• Grouping
• Regrouping
• Partial Sum
• Carrying
• Estimation
• Front- end estimation
• Reference- point estimation
• Rounding

Activity:  

• Warm-Up: Front- end estimation vs. Reference- point estimation
• Take weekly assessment
• Introduce new unit

Debrief: 

• Mental math

Homework: None