In my 30+ years of teaching Math I have yet to see a better way of introducing multiplication and division than with Cuisenaire Rods. An image of how this works is on the cover page. This is, of course, a “repeated addition” model.
For teachers who don’t have Cuisenaire Rods, there is an alternative way of doing somewhat the same thing on a number line, by coloring segments of each multiple with alternating colors.
These number lines are sized for legal paper. They only extend to 81 because if they were any smaller they’d be difficult to read and color in -- after 81, the only problems left are 9 × 9 and 10, and 10 × 10.
This lesson includes one page for each multiple 2 – 9. There are also several pages of practice problems including both fact practice ( 4 × 9 = ___ ) and missing factor problems (4 × ____ = 36 ) .
Common Core Standards:
2.OA.3: “…write an equation to express the total as a sum of equal addends.”
3.OA.1: “Interpret products of whole numbers…as the total number of objects in 5 groups of 7 objects each….”
3.OA.4: “Determine the unknown whole number in a multiplication or division equation relating three whole numbers.”
Subjects: Math, Basic Operations
Level: Grades 2-3
Length/Duration: 18 pages
Answer Key: NA
A Smart Notebook 10 file is included. Click on the .zip icon and you can open both the PDF and Notebook files separately.