List of Skills by Age

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1-2 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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2-4 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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4-6 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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6-8 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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8-10 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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10-12 Months

Although research exists for documenting number sense in the first year of life. These are laboratory studies that cannot be replicated in home visits or centers. For this reason, skills the first year of life have been omitted.

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12-15 Months

No observable skills

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15-18 Months

No observable skills

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18-21 Months

No observable skills

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21-24 Months

No observable skills

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24-27 Months

No observable skills

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27-30 Months

No observable skills

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30-33 Months

Examines a group of up to four items and creates another group of the same amount

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33-36 Months

Combines or takes away from a set to make a set of up to three objects

Mentally thinks that if you give him one more he’ll have two; and if he has two items and you take one away he’ll have one left

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36-42 Months

Uses graphics to add small numbers by drawing pictures, then counting up to 3 items

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42-48 Months

Adds up to two sets of objects up to 5

Uses graphics to add and subtract small numbers

Write numbers

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48-54 Months

Counts all in two number sets by adding on from the first set

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54-60 Months

Breaks up a total number of objects in many different combinations to make the whole set (up to 10)

Adds up the total of two same or different sets of objects up to as high as the child can count

Compares sets of objects to find the difference in amount

Solves take-away problems by separating a set of concrete objects from the total amount and counting the remainder

Finds how many objects need to be added to a set to get a specific total