Learning Goals
Students will be able to solve three-digit addition and subtraction library checkout problems using place value, regrouping, estimation, and the relationship between addition and subtraction.
Students will be able to represent three-digit addition and subtraction strategies with base-ten drawings, expanded form, and equations to show how their methods work.
Students will be able to analyze and revise solution steps for three-digit addition and subtraction by identifying errors, justifying corrections, and explaining which strategies are most accurate for library cases.
Products
Number Detective Research Notebook
A student investigation record with question notes, strategy samples, base-ten drawings, equations, and brief reflections from the library mystery cases. It shows how the student chose methods, checked answers, and revised mistakes across the week.
Library Checkout Mystery Poster and Oral Report
A team investigation product that combines members' evidence into a clear poster and short presentation about popular book checkout totals. It includes shared findings, visual models, strategy explanations, and a discussion of any surprising or conflicting results.
No rubric has been generated yet.