What is this Teaching and Learning Material (TLM) about?
This presentation provides simplified explanations of length and perimeter aligned to different learning outcomes. It covers: 
1) Measuring length using non-standard and standard units.
2) Converting between units of measurement (mm, cm, m).
3) Addition and subtraction of lengths.
4) Concept and calculation of perimeter for regular and irregular shapes.

How can I use it?
You can use it to plan your explanation OR directly present this via a projector or smartboard in your classroom