Math // Counting & Cardinality

Counting in 2s

Count in multiples of 2, 5, and 10 (skip counting)

Ages
5 to 7
Type
Method
Builds on
1 topic
Leads to
13 topics
Standards
3 codes

Quick check

If the learner is counting socks being paired up, can they skip-count in twos — 2, 4, 6, 8 — all the way to 20? Can they also count up in fives when counting coins, or in tens on a number line?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • Count 2, 4, 6, 8 … up to at least 20
  • Count 5, 10, 15, 20 … up to at least 50
  • Count 10, 20, 30 … up to 100

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

Before this

1 topic
  • Rote counting to 100Required

    Counting & Cardinality // Ages 5 to 6

    Skip counting in 2s, 5s, 10s requires fluent rote counting by ones first

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Counting in 2s

Ages 5 to 7 // Method

Leads to

13 topics
  • Counting forwards and backwards (age 6+)Required

    Counting & Cardinality // Ages 6 to 7

    Counting in tens from any number builds on skip counting in tens from 0

  • Counting forwards and backwardsRequired

    Counting & Cardinality // Ages 6 to 7

    Skip counting in 3s builds on the concept of skip counting already established in 2s, 5s, and 10s

  • Times tablesRequired

    Multiplication & Division // Ages 6 to 7

    Times tables for 2, 5, 10 build on skip counting in 2s, 5s, 10s

  • Skip Counting (4s, 8s, 50s, 100s)Required

    Counting & Cardinality // Ages 7 to 8

    Counting in 4s and 8s extends prior skip counting in 2s, 5s, 10s

  • Counting Within 1,000Required

    Counting & Cardinality // Ages 7 to 8

    Counting to 1000 by 5s/10s/100s extends skip counting from Year 2

  • Odd or EvenRequired

    Number Representation & Place Value // Ages 7 to 8

    Odd/even requires counting by 2s (skip counting)

Show all 13
  • Finding efficient methodsHelpful

    Mathematical Thinking // Ages 5 to 6

    Skip counting exercises recognising repeating calculation patterns

  • Multiplication as repeated additionHelpful

    Multiplication & Division // Ages 5 to 6

    Skip counting supports understanding equal groups (2s, 5s, 10s)

  • Patterns & SequencesHelpful

    Geometry // Ages 6 to 7

    Skip counting patterns support general pattern recognition

  • Telling Time: MinutesHelpful

    Measurement // Ages 6 to 7

    Reading 5-minute intervals benefits from skip counting in 5s

  • Odd and even numbersHelpful

    Multiplication & Division // Ages 6 to 7

    Even numbers connect to counting in 2s

  • The multiples of 10Helpful

    Number Representation & Place Value // Ages 6 to 7

    Skip counting in tens supports recognising decade numbers

  • TenthsHelpful

    Fractions // Ages 7 to 8

    Skip counting supports counting in tenths

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

Skip counting in 2s, 5s and 10s for ages 5–7, taught as counting equal GROUPS (one more group of 2/5/10 each step) rather than a memorised chant — the bridge to multiplication, repeated addition, even numbers, clock minutes and place value. Core representations are the hundred square (on a standard 10-wide square, shaded multiples of 2, 5 and 10 form straight column patterns) and the number line (equal-sized jumps landing on multiples). Learners should count from different starting multiples and in both directions, not only forward from 0.

Common misconceptions

  • Reciting the multiples as a chant with no sense that each step is +one group — so it doesn't transfer to multiplication.
  • Thinking the multiples are the ONLY numbers that 'exist', or that skip counting removes the in-between numbers (7 isn't 'skipped away').
  • Only able to start from 0 — can't skip-count from a different multiple or backwards.
  • Confusing 'counting in 2s' with 'counting to 2', or losing the pattern at decade boundaries (5s: '…45, 50, 55').

Useful representations

  • Hundred square with multiples shaded (pattern by column/diagonal).
  • Number line with equal jumps (the jump = the step size).
  • Equal groups / arrays of 2, 5, 10 (the bridge to multiplication).
  • Fingers (5s/10s), tally marks (5s), coins (5s/10s).

Teaching practices

  • Teach each skip count as adding one equal GROUP (repeated addition), not a disconnected chant — this is the multiplication seed.
  • Shade multiples on a hundred square so the visual pattern (columns/diagonals) makes the sequence predictable rather than memorised.
  • Use a number line with equal-sized jumps landing on multiples — the jump size IS the step, making 'counting in 5s' concrete.
  • Count from different starting multiples and in both directions so it is flexible, not a fixed rote song.
  • Anchor to real contexts: 2s (pairs, even numbers), 5s (fingers, tally marks, clock minutes), 10s (tens, money).

Activities to try

  1. 1

    One hop, one group: linking jumps, counters and the hundred square

    Why it works: Each step of skip counting adds (or, going back, removes) one equal group, so the next multiple can be predicted from the pattern and from 'one more group' instead of recited — this is the seed of multiplication and repeated addition.

    1. Pick which step size you are counting in: 2, 5 or 10.
    2. Take one step forward on a number line, making an equal-sized jump (a jump of 5 for 5s) that lands on the next multiple.
    3. For each jump, add a GROUP of that many counters into a new stack/tower, so you see the jump as 'one more group of five'.
    4. Shade or light up the cells you land on (5, 10, 15 …) on a hundred square as you go.
    5. Say aloud what each step adds: 'each hop adds five — one more group of five.'
  2. 2

    Spotting the pattern on a multiples chart

    Why it works: The multiples sit in a predictable visual pattern, so you can find the next one by reading the pattern rather than restarting the chant — and the pattern survives decade boundaries like 45, 50, 55.

    1. Look at a hundred square or multiples chart with the 2s, 5s or 10s already marked.
    2. Tap or point to a multiple to reveal it and the group it stands for (e.g. 15 = three groups of five).
    3. Describe the visual pattern: 10s make one straight column, 5s make two columns, 2s shade the even columns.
    4. Use the chart as a reference to answer 'what comes next in 5s after 45?' across a decade boundary.
  3. 3

    Anchoring 2s, 5s and 10s to real things

    Why it works: Skip counting describes real repeated groups — pairs, fives and tens — so 2s↔even, 5s↔clock/tallies/fingers, 10s↔place value make the counts meaningful and memorable.

    1. Count pairs of objects in 2s and connect to even numbers (2, 4, 6 …).
    2. Count hands/fingers and tally marks in 5s (5, 10, 15 …) and clock minutes in 5s.
    3. Count groups of ten — tens blocks or 10p coins — in 10s and link to place value (how many tens).
    4. Say how each context shows 'one more group': one more pair, one more hand of five, one more ten.

Topic // Standards

Curriculum standards

Codes for the curriculum statements this topic maps to. Each publisher owns its standard text.
Common Core State Standards for Mathematics
K.CC.1
The national curriculum in England: Key stages 1 and 2 framework document
Maths/Y1/NPV/2Maths/Y2/NPV/1

Math // Counting & Cardinality

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