Students will learn how to relate repeated addition to multiplication. Students will solve both mathematical and word problems. Here's an excellent lesson on this topic. Here you can see examples of mathematical problems, and here you can see a couple word problems.
Multiplication as repeated addition by Khan Academy
Relate repeated addition to multiplication by Khan Academy
Conclude by leading this investigation:
Raindrops Down Windshield (number order, algorithm)
3.OA.A.1: Interpret products of whole numbers, e.g., interpret 5 × 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 × 7.