Click on this link http://www.scootle.edu.au/ec/pin/ and have a go at solving the factor family problems. I have emailed you all the pin number that you will need to enter to access this activity.
Arrays: Factor Families Description
Make equal rows and columns to explore how numbers can be broken up into factors. For example, the number 24 can be expressed as 12×2 or 2×12, and therefore, it can be divided equally using its factors 12 and 2. Identify a missing factor to complete a factor family. Solve four expressions: two multiplication and two division statements. This learning object is one in a series of five objects.