After searching on the internet for a long time, I couldn't find many useful resources for teaching my Year 2/3 practicum class how to round Australian money to the nearest 5 cents.
Aligning with the Australian Curriculum for Year 3:
Represent money values in multiple ways and count the change required for simple transactions to the nearest five cents (ACMNA059)
To use the number line, print enough for your students, laminate and cut out so each student has one number line. Demonstrate use of the number line by putting the document up on the smartboard. Go through certain amounts, such as $1.26. Write on the first blue arrow a 1 on the line so the first arrow says $1.00, a 1 on the middle arrow so it says $1.50 and a 2 on the last blue arrow so it says $2.00.
Find where $1.26 would be on a number line and find which arrow is closest to it, that is the cent to round it to.
Students can do this on their own laminated number lines with dry erase markers (can rub out as it is on laminated paper).
Hope you can find this resource useful :)