Aims and objectives
The pupil will understand the term "two less than". They will
be able to take two away from a given number between 1 and 20.
Previous knowledge
Pupils can count up to twenty and back again in ones. They can take two
away from a given number and they are aware of all the associated vocabulary.
In the classroom
The pupil will see a set of randomly placed number cards from to
1 to 20. One number is highlighted. The pupil has to
click on the number that is 2 less. Pupils clicking on
the correct number move forward to the next task. Pupils clicking
on an incorrect answer are asked to try again. If pupils are
having difficulty, a message will tell them to ask the teacher
for help. When the pupil finishes the activity, a score appears. The
higher the score, the more praise they receive.
Pupils can access an on-line number track by clicking
on the question mark in the bottom left of the screen.
This activity, if used with an interactive whiteboard, allows the
teacher to select children to pick their answers and talk about their
decision to the rest of the class. Other children in the class can
provide help and support to their peers.
| Support materials description: |
Resource type: |
| The first worksheet offers teachers the
opportunity to develop pupils' mental agility. As part
of a whole-class activity, pupils can cut out the number
cards. When the teacher asks, "What is two
less than 20?", pupils respond by holding the correct
card in the air. More able pupils can make up questions
for the rest of the class. |
Cards.pdf |
| The second worksheet asks pupils to complete number sequences. Each sequence
counts back in twos and the sequences increase in difficulty. |
Sequence1.pdf |
| The final worksheet asks the child to complete number sentences by taking away
2. In this way, the original activity is reinforced and extended. |
Sequence2.pdf |
Curriculum references
Key Stage 1 - Numeracy Strategy:
- Count reliably at least 20 objects
- Read, write and order numbers from 0 to at least 20; understand
and use the vocabulary of comparing and ordering these numbers
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