1. Number Sense
1.1. Students understand and use numbers up to 100
1.1.1. Count, read, and write whole numbers to 100
1.1.1.1. Applets, freeware, and video clips
1.1.1.1.1. Not recommended
1.1.2. Compare and order whole numbers to 100 by using the symbols for less than, equal to, or greater than (<,=,>).
1.1.2.1. Applets, freeware, and video clips
1.1.2.1.1. Highly recommended
1.1.2.1.2. Potentially useful
1.1.3. Represent equivalent forms of the same number through the use of physical models, diagrams, and number expressions (to 20)(e.g., 8 may be represented as 4+4, 5+3, 2+2+2+2, 10-2, 11-3).
1.1.3.1. Applets, freeware, and video clips
1.1.3.1.1. Highly recommended
1.1.4. Count and group object in ones and tens (e.g., three groups of 10 and 4 equals 34, or 30+4).
1.1.4.1. Applets, freeware, and video clips
1.1.4.1.1. Highly recommended
1.1.4.1.2. Potentially useful
1.1.5. Identify and know the value of coins and show different combinations of coins that equal the same value.
1.1.5.1. Applets, freeware, and video clips
1.1.5.1.1. Highly recommended
1.1.5.1.2. Potentially useful
1.2. Students demonstrate the meaning of addition and subtraction and use these operations to solve problems.
1.2.1. Know the addition facts (sums to 20) and the corresponding subraction facs and commit them to memory.
1.2.1.1. Applets, freeware, and video clips
1.2.1.1.1. Highly recommended
1.2.1.1.2. Not recommended
1.2.2. Use the inverse relationship between addition and subtraction to solve problems.
1.2.2.1. Applets, freeware, and video clips
1.2.2.1.1. Potentially useful
1.2.3. Identify one more than, one less than, 10 more than, and 10 less than a given number.
1.2.4. Count by 2s, 5s, and 10s to 100.
1.2.4.1. Applets, freeware, and video clips
1.2.4.1.1. Highly recommended
1.2.5. Show the meaning of addition (putting together, increasing) and subtraction (taking away, comparing, finding the difference).
1.2.5.1. Applets, freeware, and video clips
1.2.5.1.1. Highly recommended
1.2.6. Solve addition and subtraction problems with one- and two-digit numbers (e.g., 5+58=__).
1.2.6.1. Applets, freeware, and video clips
1.2.6.1.1. Not recommended
1.2.7. Find the sum of three one-digit numbers.
1.3. Students use estimation strategies in computation and problem solving that involve numbers that use the ones, tens, and hundreds places.
1.3.1. Make reasonalbe estimates when comparing larger or smaller numbers.
1.3.1.1. Applets, freeware, and video clips
1.3.1.1.1. Potentially useful