Virginia SOL 2.NS.1

What students need to be able to do

• Represent forward counting patterns when counting by groups of 2 up to at least 50, starting at various multiples of 2 using tools like objects, number lines, or hundreds charts.
• Represent forward counting patterns when counting by groups of 5s, 10s, and 25s up to at least 200 using tools like objects, number lines, or hundreds charts.
• Describe and use patterns in skip counting by multiples of 2 (to at least 50), and multiples of 5, 10, and 25 (to at least 200) to justify the next number in the counting sequence.
• Represent forward counting patterns when counting by groups of 100 up to at least 1,000 starting at 0 using tools like objects, number lines, calculators, or one thousand charts.
• Represent backward counting patterns when counting by groups of 10 from 200 or less using tools like objects, number lines, calculators, or hundreds charts.
• Describe and use patterns in skip counting backwards by 10s (from at least 200) to justify the next number in the counting sequence.
• Choose a reasonable estimate up to 1,000 when given a contextual problem.
• Represent even numbers (up to 50) with concrete objects using two equal groups or two equal addends.
• Represent odd numbers (up to 50) with concrete objects using two equal groups with one leftover or two equal addends plus 1.
• Determine whether a number (up to 50) is even or odd using concrete objects and justify reasoning.