When introducing the concept of multi-digit addition with regrouping (carrying over), a teacher starts with Dienes blocks (base-10 blocks), then moves to drawing tally/block diagrams on paper, and finally introduces standard vertical column addition with numbers. This instructional sequence is an exemplary implementation of which pedagogical strategy?
Topic: Teaching Strategies in Maths - Concrete Pictorial Abstract (CPA) | Source: AI Generated (CTET Paper I (Primary: Class 1-5))