Mathematics, Grade 1

Unit 1: Number

Counting and skip-counting to 100, seeing small amounts at a glance, counting to 20, numbers to 20 and their parts, comparing and estimating sets, conservation of number, one and two more or less, and first addition and subtraction facts.

• Counting forward and backward by 1s
• Skip-counting by 2s, 5s, and 10s

• Seeing how many at a glance
• The last number tells how many
• A set has only one count
• Counting on from a number you know

• Showing numbers to 20
• Breaking a number into two parts

• Comparing sets with a referent
• Matching sets one to one
• Estimating amounts to 20

• The number stays the same
• One more, two more, one less, two less

• Adding and subtracting: join and separate stories
• Part-part-whole: two parts make a whole
• Counting-based strategies for sums and differences
• Making ten and using doubles

Unit 2: Patterns and Relations

Repeating patterns, the equal sign as a balance, and recording equalities.

• Describing and extending repeating patterns
• Copying and creating repeating patterns

• Balance and imbalance
• Writing equalities with the equal sign

Unit 3: Measurement

Measurement as a process of comparing — naming attributes, ordering objects, making comparison statements, and comparing by filling, covering, or matching.

• Comparing and ordering by an attribute
• Comparing by filling, covering, and matching

Unit 4: Geometry

Sorting 2-D shapes and 3-D objects by an attribute, building composite shapes, and finding 2-D shapes in 3-D objects.

• Sorting shapes and objects
• Building shapes from smaller shapes
• Finding flat shapes on solid objects