**Spin and Flip Counting - focus on twenties**

**Focus: **When students are adding or
taking a small number from a larger one, they initially
need to rely on counters and count from “one” to find the
total. Accordingly, when adding, they also tend not to
consider the relative size of the two collections.
Students need to develop the strategy of counting on or
back from the larger group when adding or taking a small
number from a larger group, in order to become more
efficient and 'fluent' with numbers, and to move away from
a reliance on counters and towards a use of mental
strategies. If students are having difficulties, they may
need to spend more time on the Counting On and Back game
in this section, using a number line as an intermediate
step.

NB: counting in itself is a very inefficient strategy
for adding and subtracting more than two or three. More
efficient strategies are examined in the Part Part Whole,
and Addition, Subtraction sections.

**How: **See *Spin
and Flip counting sheet *(twenties)

*Download
Spin and Flip game board* (twenties)

Download
Spin and Flip cards

*Download Spinner
(16 - 25)*