Subitising/ Part-part-wholeWHOLE NUMBERS

Now and Next

Where are they now?

Participating in structured and supported counting rhymes and songs - counting and numbering concepts still in development

Where to next?

Recognises collections to 5 in less than 2 seconds without counting

Purpose

When students associate mental images of dot patterns or collections of objects with numbers (either stated orally or written), they are more likely to understand that maths is about quantities and not just memorising word patterns.

Resources

Activities where students are encouraged to quickly identify collections up to five help to develop this idea.

 

Linked activitiesLinked Activities

  • download Subitising cards
  • download Modified See-Say Bingo ( numbers 1 to 5)

AssessmentAssessment

  • download What my number looks like
  • download Probe Task: Suitising

other resources References to Other Resources

 

 

Activities and Assessments

 

download Subitising Cards

Subitising cards

Focus: Visualise and identify numbers to 5 as dot patterns or as the total made by groups of dot patterns.

How: Students work in pairs and take turns to ‘flash’ (show for about two seconds) the cards to each other. A thirty second timer can be used and the total of correct answers recorded (the total number of dots can be written on the back of the card to assist the person ‘flashing’). Students try to beat their previous scores. It is important that this is modelled by a teacher with the whole class at regular intervals and that students are given a chance to explain or discuss personal strategies. Choose subitising cards showing five dots or less for this activity.

Download subitising cards

download Modified See-Say Bingo ( numbers 1 to 5)

See-Say Bingo 

Focus: Developing automaticity in identifying how many objects are in a collection - up to a total of 5. Choose subitising cards showing five dots or less for this activity.

How: See-Say Bingo instructions

Download Bingo Cards

download Assessment: Subitising Probe Task

Subitising Probe Task 

Diagnostic assessment task suitible for indiviual students or small groups

Download Subitising Probe task (instructions and BLMs)

Alternate layout for Set 5 (small cards)

 

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