多桁の掛け算の戦略と練習

Over the course of this class, students will make sense of multi-digit multiplication. Each lesson will include worked out examples, opportunities for students to explain their thinking or share their work, and time for independent practice with teacher feedback. While this class will focus on computation, some word problems may be incorporated to help make the concept of multiplication more concrete.

The first two classes will progress from skip counting from a known fact, to using an array/area model and partial products to multiply a multi-digit number by a single-digit number. The next two classes will extend the array model/partial products strategy to multiply two two-digit numbers together, then finally introduce the standard algorithm as a shorthand. The final two classes will be opportunities for students to practice multiplication with the strategy of their choice.