Primary Resources
Grid Multiplication
Ever have a completely confused fourth grader ask about multiplying a 3-digit by a 2-digit number? This slide show could really help clear things up. The grid or box method is fully demonstrated and explained in this straight forward...
Shmoop University
Shmoop: Basic Algebra: Multiplying Binomials
Students learn how to multiply binomials using the box method and FOIL method. The tutorial explores the algebra concept through notes, examples, and practice exercises.