Skip to content

What does a student learn in ?

This is the year numbers become real. Students learn to count to 100, write numbers up to 20, and figure out which group has more or fewer. They start adding and taking away small amounts using fingers, blocks, or drawings, and they name shapes like circles, squares, and cubes. By spring, students can count a pile of 20 objects and solve simple problems like 3 plus 2 without much help.

Illustration of what students learn in Kindergarten Mathematics
  • Counting to 100
  • Writing numbers
  • Adding and subtracting
  • Comparing groups
  • Shapes
  • Sorting objects
Source: California Content Standards for California Public Schools
Year at a glance
How the year usually goes. Every school and district set their own curriculum, so treat this as a guide, not official pacing.
  1. 1

    Counting and naming numbers

    Students count out loud to 100 and learn to write numbers from 0 to 20. They point to each object as they count and figure out how many are in the group.

  2. 2

    Comparing groups and shapes

    Students decide which group has more, less, or the same. They also start naming everyday shapes like circles, squares, and triangles, and describe where things sit, such as above or next to.

  3. 3

    Adding and subtracting to 10

    Students use fingers, drawings, and small objects to put numbers together and take them apart. They solve simple word problems and build quick recall for sums and differences up to five.

  4. 4

    Teen numbers and measuring

    Students see that numbers like 14 are made of one ten and some extra ones. They also compare objects by length and weight, sort items into groups, and count how many are in each group.

  5. 5

    Building and combining shapes

    Students tell flat shapes apart from solid ones and count sides and corners. They build shapes from sticks and clay and put smaller shapes together to make bigger ones.

Mastery Learning Standards
The required skills a student should display by the end of Kindergarten.
Counting and Cardinality
Standard Definition Code

Count to 100 by ones and by tens

Students count to 100 out loud, moving one number at a time or jumping by tens. This is the foundation for every addition and money problem they will meet in first grade.

CA-K.CC.1

Count forward beginning from a given number within the known sequence

Students practice counting forward from any number, not just from 1. Given a starting number like 4 or 7, they keep the sequence going from there.

CA-K.CC.2

Write numbers from 0 to 20

Students write the numbers 0 through 20 and match each number to the right count of objects. Zero means nothing is there.

CA-K.CC.3

Understand the relationship between numbers and quantities

Counting a group of objects means the last number said tells how many there are total. Students also learn that each next number is always one more than the one before.

CA-K.CC.4

Count to answer “how many?” questions about as many as 20 things arranged in a…

Count a group of up to 20 objects arranged in a line or circle, and up to 10 objects scattered randomly. Students also count out a specific number of objects when asked, and say which group has more.

CA-K.CC.5

Identify whether the number of objects in one group is greater than, less than

Students compare two groups of objects and decide which group has more, which has fewer, or whether both groups have the same amount.

CA-K.CC.6

Compare two numbers between 1 and 10 presented as written numerals

Students look at two written numbers and say which one is bigger or smaller. This is an early step toward understanding how numbers relate to each other.

CA-K.CC.7
Geometry
Standard Definition Code

Describe objects in the environment using names of shapes

Students name the shapes they see around them, like circles, squares, and triangles, then describe where things are using words like above, below, beside, and next to.

CA-K.G.1

Correctly name shapes regardless of their orientations or overall size

Students learn to name shapes like circles, triangles, and squares no matter how big they are or which way they're turned. A triangle lying on its side is still a triangle.

CA-K.G.2

Identify shapes as two-dimensional

Students sort shapes into two groups: flat shapes like circles and squares, and solid shapes like cubes and cones. They compare shapes by size and sides, then use smaller shapes to build bigger ones.

CA-K.G.3

Analyze and compare two- and three-dimensional shapes, in different sizes and…

Students look at shapes like squares, triangles, and boxes, then describe what makes them alike or different. They notice things like how many sides or corners a shape has, whether the sides are equal, and whether the shape is flat or solid.

CA-K.G.4

Model shapes in the world by building shapes from components

Students build shapes by hand, using materials like sticks and clay, and by drawing them. The focus is on how shapes are actually put together, not just what they look like in a picture.

CA-K.G.5

Compose simple shapes to form larger shapes

Students fit small shapes together to build bigger ones, like joining two triangles side by side to make a rectangle. This is early practice in seeing how shapes combine and relate to each other.

CA-K.G.6

Look for and make use of structure

Students look at shapes like squares and circles to spot patterns in how they're put together. That noticing helps them understand addition and subtraction.

CA-K.G.7

Look for and express regularity in repeated Measurement and Data reasoning

Students sort and describe shapes by noticing what makes them alike or different, such as how many sides or corners each one has.

CA-K.G.8
Measurement and Data
Standard Definition Code

Describe measurable attributes of objects, such as length or weight

Students pick up an object and describe what can be measured about it: how long it is, how heavy it feels, or how tall it stands. One object can have more than one measurable attribute.

CA-K.MD.1

Directly compare two objects with a measurable attribute in common, to see…

Students pick two objects, like two pencils or two cups, and decide which one is taller, longer, or heavier. Then they put a group of objects into categories and count how many are in each group.

CA-K.MD.2

Classify objects into given categories

Students sort everyday objects into groups (by color, shape, or size), count how many are in each group, and put the groups in order from smallest to biggest.

CA-K.MD.3
Number and Operations in Base Ten
Standard Definition Code

Compose and decompose numbers from 11 to 19 into ten ones and some further…

Students break numbers like 13 or 17 into a group of ten and some leftovers. 13 is ten and three more. This is the first step toward understanding how our number system works.

CA-K.NBT.1
Operations and Algebraic Thinking
Standard Definition Code

Represent addition and subtraction with objects, fingers, mental images…

Adding and subtracting can be shown in lots of ways. Students use fingers, drawings, claps, or small objects to act out simple math problems before writing any numbers down.

CA-K.OA.1

Solve addition and subtraction word problems

Students solve simple adding and subtracting stories using numbers up to 10. They can use blocks, fingers, or drawings to figure out the answer.

CA-K.OA.2

Decompose numbers less than or equal to 10 into pairs in more than one way…

Students break a small number into two parts in more than one way. For example, 7 can be split into 3 and 4, or into 6 and 1, and students draw or write an equation to show each split.

CA-K.OA.3

For any number from 1 to 9, find the number that makes 10 when added to the…

Students pick a number between 1 and 9, then figure out how many more are needed to reach 10. They show the answer by drawing or writing a simple equation.

CA-K.OA.4

Fluently add and subtract within 5

Students quickly and correctly add and subtract small numbers, like 2 + 3 or 4 minus 1, without counting on fingers. The goal is confident recall, not working it out each time.

CA-K.OA.5
No state assessments at this grade
Students take their next one in Grade 3.
State test

Smarter Balanced Mathematics — Grade 3

The grade 3 math test in the CAASPP suite. Adaptive computer-based questions plus a performance task covering the Common Core grade 3 math standards.

When given:
Spring of grade 3
Frequency:
Annual
Official source
Alternate assessment

California Alternate Assessment (CAA) for Mathematics

The state test for students with the most significant cognitive disabilities. Replaces Smarter Balanced math in grades 3-8 and 11 for the small group of students whose IEP teams qualify them.

When given:
Spring window each year
Frequency:
Annual
Official source
Common Questions
  • What math should students know by the end of the year?

    Students should count to 100 by ones and tens, write numbers 0 to 20, and add and subtract small numbers up to 5 without much thinking. They should also name common shapes and compare which group has more or less.

  • How can families practice counting at home?

    Count real things together: stairs going up, blueberries on a plate, cars in the driveway. Touch each object once as the number is said. A few minutes a day matters more than long sessions.

  • What does it mean to make ten?

    Students learn that numbers like 14 are made of one ten and four extra ones. Practice at home with snacks: put ten crackers in a row, then add a few more, and ask how many in all.

  • How should addition and subtraction be introduced?

    Start with objects, fingers, and acting out short stories before showing any equations. Once students can solve problems with cubes or drawings, connect the action to symbols like 3 + 2 = 5. Fluency within 5 comes from repeated practice, not memorization drills.

  • My child writes some numbers backwards. Is that a problem?

    Reversed numbers like 3 or 7 are common at this age and usually fade with practice. Keep modeling the correct formation and praise effort. If reversals are still frequent at the end of the year, mention it to the teacher.

  • How should counting and place value be sequenced across the year?

    Build counting to 20 with one-to-one matching first, then push to 100 by ones and tens once that is solid. Save the teen numbers as ten and some more for the middle of the year, after students can count and write to 20 with confidence.

  • Which skills usually need the most reteaching?

    Counting objects in scattered arrangements, comparing written numerals, and decomposing teen numbers into ten and ones. Plan to revisit these in small groups throughout the year rather than teaching them once and moving on.

  • How do shapes fit into kindergarten math?

    Students name shapes like circles, squares, triangles, and cubes no matter how they are turned, and they describe where things are using words like above, below, and next to. At home, point out shapes in signs, buildings, and food.

  • How do we know students are ready for first grade?

    They can count out a given number of objects up to 20, write numbers to 20, compare two written numbers from 1 to 10, and solve simple add and subtract stories within 10. Quick recall within 5 should feel automatic.