According to the Common Core Standards, 1st grade math resources should focus on four critical areas: (1) developing understanding of addition, subtraction, and strategies for addition and subtraction within 20; (2) developing understanding of whole number relationships and place value, including grouping in tens and ones; (3) developing understanding of linear measurement and measuring lengths as iterating length units; and (4) reasoning about attributes of, and composing and decomposing geometric shapes.
If you know a particular Common Core Domain that you'd like to practice, you can drill down to it here.
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Slow the large green slime by answering subtraction problems correctly. Aim and fire at the correct answer.
Help Miro visit buildings in town by counting to 10
Use chalk to break shapes into equal parts!
Practice subtraction using pictures
Work with bar graphs to count and compare items.
Example using both the commutative and associative laws of addition (3:23)
Fun song teaching addition and subtraction (2:31)
Students teach adding tens to 2-digit numbers
Learn about simple addition to learn about tens and ones (12:26)
Adding larger number with tens and ones (1:32)
Use dots as an aid to assist in addition under 20.
Look at the digital time and draw the hours and minutes on an analog clock.
Measure the height of the trees using the cut out ruler.
Practice adding two numbers up to 9.
Practice basic addition with two digits less than 30.