A concise teacher answer key for the Digit Shift Worksheet, featuring solved HTO blueprints and numeric results for quick grading.

A fill-in-the-blank worksheet for mastering place value shifts, featuring color-coded HTO (Hundreds, Tens, Ones) diagrams for each operation.

A visual slide deck introducing the concept of place value shifting when adding or subtracting 1, 10, or 100, featuring color-coded HTO diagrams and animations.

A quick check for understanding for Lessons 17 & 18 (Strategy Squad). Students choose their preferred strategy to solve a complex subtraction problem and justify their choice. Features two lines for writing.

An 80-minute instructional guide for Lessons 17 & 18 (Strategy Squad). Focuses on selecting efficient strategies and justifying mathematical thinking. Consolidated for efficient one-page printing.

A quick check for understanding for Lesson 15 (Path to Difference). Students solve a subtraction problem using an open number line. Features clear labels and high-contrast work areas.

Answer key for Path to Difference worksheet, providing the jump paths and final solutions for open number line subtraction.