Recalling Multiplication Facts – A lesson on using arrays with multiplication in years 2/3/4

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Summary:

In this lesson, students explore the concept of arrays through an enjoyable game that is played with 2 dice, but can be modified to extend more able students. The teacher has many teaching moments to discuss strategies for multiplication, such as repeated addition, skip-counting, doubling and many more. A great starter for any multiplication lesson.

Australian Curriculum Links:

Year 2:
Year 3:
  • Recall multiplication facts of two, three, five and ten and related division facts (ACMNA056)

Year 4:

 

WALT:

We are learning to perform multiplication calculations using the numbers from 1 through to 6.

Lesson:

Orientation  5 minutes

Guided Discovery
  • Demonstrate how to play the Array Game.

http://nzmaths.co.nz/resource/array-game

Exploration

  • The Array Game: Students play in pairs each has their own 10×10 grid. Each player rolls 2 6-side dice and colours in the area on the grid indicated by the dice. For example, if a player rolls a 2 and a 3 they colour in any 2×3 rectangle. Students write down their multiplication fact (2×3) inside the squares they have blocked. Students play until one player cannot fit an array. The last student to make a full array win.
  • Students play the game again with the same rules, however this time students write down the multiplication fact (e.g. 2×3) with the answer (6- total number of squares coloured) inside the squares they have blocked.

Individualising

  • Extend: Play the array game by putting a cost on each square to make it like a farmers land and see who purchases the most land.
  • Support: Assist student having difficulty playing the array game.

Reflection  5  minutes

  • Share/Explain/Justify Reflect: Who won in each team? Does placing your blocks horizontally or vertically make a difference? Why/why not?
  • Consolidate: Do you think arrays are a good way to do multiplication? Why/why not?
  • Challenge/Extend: Who thinks they can play the Array game on a 1000s grid?

Assessment:

  • Teacher observation and product analysis

Resources:

[wpfp-link]

 

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