"Who Is Worthy? Elapsed Time" is an engaging math challenge with a focus on elapsed time. Students practice key elapsed time skills throughout the math challenge with a series of carefully designed word problem clues.

In this "Who Is Worthy?" challenge, the head of a billion-dollar time-travel company is looking for her successor. She has left a series of clues all about elapsed time. The first student team to solve her clues and find the hidden gem will have proven themselves worthy of her fortune!

I provide you with everything you need for the challenge, including:

• detailed instructions and diagrams for preparing and setting up the materials
• activity procedure script for you to introduce and run the challenge
• 6 carefully crafted student clues with a math focus on elapsed time
• five difficulty levels of all student clues (See below for details on levels.)
• two "skill boost" student reference pages that walk through strategies for solving elapsed time problems
• printable "gem" prizes
• full answer keys
• additional support materials to help the challenge run smoothly

This "Who Is Worthy?" math challenge is in the same vein as an escape room challenge or a Box Is Locked! challenge, where student teams engage in a friendly competition to be the first to solve all the clues. Feel free to mix-and-match difficulty levels to help differentiate the math for your particular students. Additional methods to make the challenge as fair as possible are included in the resource.

Details on Difficulty Levels

The math focus in this activity is elapsed time. 5 difficulty levels of the clues are included. The challenge is most appropriate for students in grades 3-5. However, it may also work for students in grade 6. The challenge is intended to be done in partnerships. Please see below and check out the preview for a closer look at the specific math skills involved at each level and the appropriateness for your group of students.

Level AA, A, B, C, D: All five levels involve solving one and two-step word problems focused on elapsed time, including:

• Given a start time and end time, find the elapsed time.
• Given a start time and elapsed time, find the end time.
• Given an end time and elapsed time, work backwards to find the start time (*only once)
• Find and compare elapsed times.

Features of Level AA (grade 3):

• In general, Level AA is a simplified version of Level A, with fewer multi-step problems.
• Only 5-minute intervals are used
• All elapsed time totals are 1-hour or less
• Sometimes students must "cross over" the hour mark.

Features of Level A (grade 3-4):

• Only 5-minute intervals are used
• All elapsed time totals are 1-hour or less
• Sometimes students must "cross over" the hour mark.

Features of Level B (grade 3-4):

• Mostly 5-minute intervals are used; sometimes 1-minute intervals are used
• All elapsed time totals are 1-hour or less
• Often students must "cross over" the hour mark.

Features of Level C (grade 4):

• Mostly 1-minute intervals are used
• Most elapsed time totals are 1-hour or less; some totals are more than 1-hour
• Often students must "cross over" the hour mark.

Features of Level D (grade 4-5):

• Mostly 1-minute intervals are used
• Many elapsed time totals are more than 1-hour
• Often students must "cross over" the hour mark.

Be sure to check out ALL my math challenges:

• Who Is Worthy? Area & Perimeter
• Who Is Worthy? Elapsed Time
• Who Is Worthy? Decimal Place Value
• The Box Is Locked! Addition & Subtraction (8 challenges available!)
• The Box Is Locked! Multiplication & Division (8 challenges available!)

**NOTE: This resource is NOT editable.**

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**For personal and single classroom use only. If using with multiple classrooms, please purchase additional licenses at the discounted rate.**