Virginia Standards of Learning
Number and Number Sense Focus: Place Value, Number Patterns, and Fraction Concepts
2.4 The student will:
a) count forward by twos, fives, and tens to 100, starting at various multiples of 2, 5, or 10;
b) count backwards by tens from 100; and
c) recognize even and odd numbers.
2.4 The student will:
a) count forward by twos, fives, and tens to 100, starting at various multiples of 2, 5, or 10;
b) count backwards by tens from 100; and
c) recognize even and odd numbers.
Background Information
- The patterns developed as a result of grouping and/or skip counting are precursors for recognizing numeric patterns, functional relationships, and concepts underlying money, time telling, multiplication, and division. Powerful models for developing these concepts include counters, hundred chart, and calculators.
- Skip counting by twos supports the development of the concept of even numbers.
- Skip counting by fives lays the foundation for reading a clock effectively and telling time to the nearest five minutes, counting money, and developing the multiplication facts for five.
- Skip counting by tens is a precursor for use of place value, addition, counting money, and multiplying by multiples of 10.
- Odd and even numbers can be explored in different ways (e.g., dividing collections of objects into two equal groups or pairing objects).
Vocabulary
- Skip Counting-Counting numbers in a certain order, skipping a certain amount of numbers, i.e. skip count by 2: 2, 4, 6, 8, 10.
- Even-A number is even if it ends in 2, 4, 6, 8, or 0.
- Odd-A number is odd if it ends in 1, 3, 5, 7, or 9.
- Backwards-Counting numbers in reverse order.