Answer key for the elapsed time worksheet and exit ticket. Updated symbols to use Hill (🌄) instead of House. Optimized for lower ink usage.

Quick assessment exit ticket for the elapsed time lesson. Corrected number line positioning for better student use and improved text contrast for clarity. Standardized on a one-page layout.

Student worksheet for practicing elapsed time. Includes an explicit 'I Do' modeling section, strategy key, and standardized work areas with sufficient space for drawing 'Mountain, Hill, Rock' jumps. Updated symbols to use Hill (🌄) instead of House.

Engaging slide deck for introducing elapsed time. Uses a 'Time Travel' theme with the 'Mountain, Hill, Rock' strategy to model finding start and end times. Updated symbols to use Hill (🌄) instead of House.

Comprehensive teacher guide for the Elapsed Time lesson. Includes lesson pacing, explicit teaching scripts, common misconceptions, and discussion prompts for a 90-minute block. Updated symbols to use Hill (🌄) instead of House.

Comprehensive answer key for Version 2 (Form B) of the Number Builders CFA. Includes correct answers, strategy demonstrations, and sample justifications for higher-order questions.

Version 2 (Form B) of the Number Builders CFA for standard 2.NBT.B.6. Contains 12 fresh questions across DOK levels 1-3 using expanded form, place value charts, and number lines. Includes error analysis and problem design tasks.

A comprehensive answer key for the Number Builders CFA, providing correct answers, step-by-step solutions for strategy-based questions, and sample justifications for higher-level DOK questions.

A 12-question Common Formative Assessment (CFA) for standard 2.NBT.B.6, organized by DOK levels 1-3. The worksheet features a "Blueprint" theme and requires students to use expanded form, place value charts, and number lines to add up to four two-digit numbers.

Detailed answer key for the Garden Plot Worksheet. Expanded to cover all 5 problems with visual solutions and strategy explanations.