A quick assessment for Monday to check student understanding of adding two-digit numbers. Students can choose any of the three strategies introduced that day.

A final independent assessment for Lesson 21 to evaluate mastery of two-digit addition with regrouping using any strategy. Revised for better layout and high-contrast labels.

Friday's independent practice worksheet where students choose their preferred strategy to solve two-digit addition problems, including those with regrouping. Revised for better page-breaks and high-contrast labels.

A quick assessment for Thursday to check student understanding of adding two-digit numbers using the "split" (decomposing) method. Revised for better branching visuals and high-contrast labels.

Thursday's practice worksheet introducing the "split" method, decomposing two-digit numbers into tens and ones before adding. Revised for better branching visuals and layout.

Tuesday's practice worksheet using a hundred chart to visualize adding tens and ones. Includes guided strategies and a miniature chart for reference. Revised for completeness and readability.

Monday's practice worksheet focusing on using base-ten models to add two-digit numbers, with a gentle introduction to regrouping. Revised for better page-breaks and visibility.

A comprehensive weekly lesson guide for the teacher, outlining daily strategies, standards, and pacing for Lesson 21. Revised for better layout and content flow.

A final independent assessment for Lesson 21 to evaluate mastery of two-digit addition with regrouping using any strategy.