Counting & Cardinality

14 Skills in Mathematics. 14 are ready to try — three verified questions each, no account needed.

Ready to try

Ages 4–6
Comparing groups: more or fewer
Compare two groups of objects to determine which has more, fewer, or whether they are equal, using matching and counting strategies
10 verified questions on this shelf
Ages 4–6
How Many in Total?
Cardinality principle: the last number said when counting a set tells how many objects are in the set, regardless of arrangement or order counted
11 verified questions on this shelf
Ages 4–6
One More Each Time
Each successive counting number represents a quantity that is one larger than the previous number
10 verified questions on this shelf
Ages 4–6
One-to-one counting
One-to-one correspondence when counting objects: each object is paired with exactly one number name
67 verified questions on this shelf
Ages 4–6
Representing numbers with objects
Represent numbers using objects, pictorial representations, and the number line
15 verified questions on this shelf
Ages 5–7
Counting in 2s
Count in multiples of 2, 5, and 10 (skip counting)
21 verified questions on this shelf
Ages 5–6
Counting objects to 20
Count a set of objects to answer 'how many?' for sets up to 20 (arranged in lines, arrays, circles, or scattered)
5 verified questions on this shelf
Ages 5–6
Rote counting to 100
Rote count forwards and backwards from 0 to 100, beginning from 0, 1, or any given number, by ones
14 verified questions on this shelf
Ages 5–6
Two written numerals between 1 and 10
Compare two written numerals between 1 and 10 to determine which is greater or less
11 verified questions on this shelf
Ages 6–7
Counting forwards and backwards
Count forwards and backwards in steps of 3 from 0
11 verified questions on this shelf
Ages 6–7
Counting forwards and backwards (age 6+)
Count forwards and backwards in tens from any number (not just multiples of 10)
10 verified questions on this shelf
Ages 7–8
Counting Within 1,000
Count within 1000, including skip-counting by 5s, 10s, and 100s
19 verified questions on this shelf
Ages 7–8
Skip Counting (4s, 8s, 50s, 100s)
Count from 0 in multiples of 4, 8, 50, and 100
16 verified questions on this shelf
Ages 8–9
Counting in 6s
Count in multiples of 6, 7, 9, 25, and 1000
10 verified questions on this shelf

Skill names and descriptions include the Marble Skill Taxonomy © Generative Spark, Inc. (withmarble.com), licensed under ODbL 1.0 (database) and CC BY-SA 4.0 (content). Practice questions are GlowGrades's own, each checked by independent verifiers that must agree before a child ever sees it.