Time Frame
1 class periods of 60 minutes each
Summary
Students will add and subtract two-digit numbers, and explain their thinking as they determine how many school days until Winter Break.
Materials
- September-December calendars
- Paper and Pencils
Background for Teachers
Websites
- USOE
NBT Core Curriculum Guide
Background
- Students need to be proficient with NBT Standard 2 prior to this task.
- Students need to be proficient with single digit addition and subtraction using multiple strategies
- Teachers need to be familiar with asking guided questions
Student Prior Knowledge
Prior Knowledge:
- Students need to have mastered single digit addition and subtraction using a variety of strategies
- Students should have mastered NBT standard 2, counting within 1000
- Students need to be familiar with explaining their thinking
- Students need to be comfortable with working collaboratively
Intended Learning Outcomes
- Students will be able to explain why addition and subtraction strategies work, using place value and the properties of operations.
- Targeted Mathematical Practices: MP 1; MP 2; MP 3; MP 6
Instructional Procedures
Using calendars students will determine how many days until winter break.
Strategies for Diverse Learners
Differentiation
- Teachers will need to be sensitive to those students who celebrate a holiday during Winter Break
- Possible interventions include having students determine how many days to Fall Break or Thanksgiving Break
- Can include or exclude weekends
Extensions
Extensions:
- Students can determine how many full seven-day weeks and remaining days left until a break
- Extend to a later vacation time
- Students can teach their parents how they solved the problem
Created: 08/06/2014
Updated: 02/04/2018
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