Before You Begin this Unit…  Unit at a Glance  
The work of this unit precedes multiplying decimals from the previous unit. Grade 5 teachers are finding that students are better able to make connections to the computation of multiplying/dividing decimals when they relate it to multiplying/dividing whole numbers. This is why this unit has been moved to precede Investigation 3 of Unit 6.
Grade 5 students are required to fluently multiply multidigit whole numbers using a standard algorithm. Mathematical fluency can be defined as accurate, efficient, and flexible. If your students approach the operation of multiplication mechanically, with little attention to the numbers themselves they may be lacking flexibility.
Mathematical properties that underlie the operation of multiplication are essential to algebra work in secondary mathematics. Students who default to the US traditional algorithm as their only way to approach multiplication may find themselves ill prepared for middle and high school mathematics. This standard calls for fluency with an algorithm. An algorithm is a series of steps for completing a task. Algorithms may differ for students in a given classroom.
Grade 5 students are expected to master this standard by the end of their grade 5 year. Calling for mastery of this standard before this point in the year may stifle a student’s natural continuum of understanding. They must arrive at the “finish line” for grade 5 but they will not all arrive at the same time, date or using the same path. 
Suggested Dates: 

Standards Addressed in the Unit  
Link to CCSS Unpacking Document Updated Sept. '15
5NBT5. Fluently multiply multidigit whole numbers using the standard algorithm. 5NBT6. Find wholenumber quotients of whole numbers with up to fourdigit dividends and twodigit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explain the calculation by using equations, rectangular arrays, and/or area models. 