This resource contains three videos that could be used in a variety of ways. The video can be paused and students questioned on what is happening. Examples can then be attempted before the answer is given. The example can be played with the sound off and students asked to write a script for the video. Students could then make their own video if they had access to appropriate technology.
Factors – Beginning with the definition of what a factor is, this video proceeds to find the factors of 12 with the aid of a factor bug. It continues by finding the factors of 18 and then 17. The fact that 17 only has two factors indicates that 17 is a prime number.
Students can be asked to investigate which numbers have an odd number of factors? When can you stop trying to find more factors? How do you ensure all the factors?
Multiples – This video shows the link between multiples and times tables and asks questions such as; is 23 a multiple of 4?
Prime Numbers – This video also uses factor bugs to find the factors of a number. The video explains that 1 is not a prime number as it only has one factor. There is a brief section talking about the history of maths, the work of Euclid, how prime numbers have a role to play in internet security and the length of the largest known prime number.