The purpose of this activity is to engage students in using a non-standard unit to give a measurement involving fractions.
In readiness for this problem, the students should have familiarity with each of the following components of mathematics. The problem may be solved with different combinations of these components.
- units of length (cm, m)
- using non-standard units for measurement
- addition of basic fractions (½, ¼)
This activity may be carried out with guidance, or by allowing the student to follow their own method of solution. The approach should be chosen in sympathy with students’ skills and depth of understanding.
The arithmetic approach (show more)
- The student is able to solve a problem using a non-standard units of measurement involving fractions.
Prompts from the teacher could be:
- Estimate the number of adult teeth that would be needed to make the length of on shark’s tooth.
- How many lots of 1 ½ would you need to add together to make 7 ½?
- How many adult teeth are needed to make the length of one shark’s tooth?
The visual approach (show more)
- The student is able to represent a problem using a non-standard units of measurement involving fractions, leading to a solution.