More or less estimator
http://www.shodor.org/interactivate/activities/MoreOrLessEstimator/
A lesson plan for grades K–12 Mathematics
This activity allows the user to estimate quantities and sizes including the number of objects in a set, the lengths of a curve, and the area of a shape
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 1
- Goal 1: Number and Operations - The learner will read, write, and model whole numbers through 99 and compute with whole numbers.
- Objective 1.01: Develop number sense for whole numbers through 99.
- Connect the model, number word, and number using a variety of representations.
- Use efficient strategies to count the number of objects in a set.
- Read and write numbers.
- Compare and order sets and numbers.
- Build understanding of place value (ones, tens).
- Estimate quantities fewer than or equal to 100.
- Recognize equivalence in sets and numbers 1-99.
- Objective 1.01: Develop number sense for whole numbers through 99.
- Goal 2: Measurement - The learner will use non-standard units of measure and tell time.
- Objective 2.01: For given objects:
- Select an attribute (length, capacity, mass) to measure (use non-standard units).
- Develop strategies to estimate size.
- Compare, using appropriate language, with respect to the attribute selected.
- Objective 2.01: For given objects:
Grade 2
- Goal 1: Number and Operations - The learner will read, write, model, and compute with whole numbers through 999.
- Objective 1.01: Develop number sense for whole numbers through 999.
- Connect model, number word, and number using a variety of representations.
- Read and write numbers.
- Compare and order.
- Rename.
- Estimate.
- Use a variety of models to build understanding of place value (ones, tens, hundreds).
- Objective 1.01: Develop number sense for whole numbers through 999.
- Goal 2: Measurement - The learner will recognize and use standard units of metric and customary measurement.
- Objective 2.01: Estimate and measure using appropriate units.
- Length (meters, centimeters, feet, inches, yards).
- Temperature (Fahrenheit).
- Objective 2.01: Estimate and measure using appropriate units.
Grade 3
- Goal 1: Number and Operations - The learner will model, identify, and compute with whole numbers through 9,999.
- Objective 1.06: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
- Goal 2: Measurement - The learner will recognize and use standard units of metric and customary measurement.
- Objective 2.02: Estimate and measure using appropriate units.
- Capacity (cups, pints, quarts, gallons, liters).
- Length (miles, kilometers).
- Mass (ounces, pounds, grams, kilograms).
- Temperature (Fahrenheit, Celsius).
- Objective 2.02: Estimate and measure using appropriate units.
Grade 4
- Goal 1: Number and Operations - The learner will read, write, model, and compute with non-negative rational numbers.
- Objective 1.05: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Grade 5
- Goal 1: Number and Operations - The learner will understand and compute with non-negative rational numbers.
- Objective 1.03: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Grade 6
- Goal 1: Number and Operations - The learner will understand and compute with rational numbers.
- Objective 1.07: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Grade 7
- Goal 1: Number and Operations - The learner will understand and compute with rational numbers.
- Objective 1.03: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Grade 8
- Goal 1: Number and Operations -The learner will understand and compute with real numbers.
- Objective 1.02: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Grade 9–12 — Introductory Mathematics
- Goal 1: Number and Operations - The learner will understand and compute with real numbers.
- Objective 1.02: Develop flexibility in solving problems by selecting strategies and using mental computation, estimation, calculators or computers, and paper and pencil.
Kindergarten
- Goal 1: Number and Operations - The learner will recognize, model, and write whole numbers through 30.
- Objective 1.01: Develop number sense for whole numbers through 30.
- Connect model, number word (orally), and number, using a variety of representations.
- Count objects in a set.
- Read and write numerals.
- Compare and order sets and numbers.
- Use ordinals (1st-10th).
- Estimate quantities fewer than or equal to 10.
- Recognize equivalence in sets and numbers 1-10.
- Objective 1.01: Develop number sense for whole numbers through 30.


