Lesson Plan: One More and One Less: Numbers up to 20 Mathematics • First Year of Primary School
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to find one more and one less for numbers between 10 and 20, investigating which digit changes.
Objectives
Students will be able to
- identify one more than a given number,
- identify one less than a given number,
- identify a number that comes before a given number,
- identify a number that comes after a given number.
Prerequisites
Students should already be familiar with
- counting within 20.
Exclusions
Students will not cover
- comparing numbers up to 20,
- ordering numbers up to 20,
- writing numbers up to 20 in words.
