## Non-Standard Units

### TEKS Objective

The students will measure organisms and objects and parts of organisms and objects, using non-standard units.

### Essential Understanding

The student uses age-appropriate tools and models to investigate the natural world.

### Science Background

Measurement, Classroom Case Studies Grade K-2: The Annenberg Foundation (website) - In 1st grade, students are not learning about measurement using standard units. They are simply comparing objects (e.g., how heavy or light something is; which object is heavier or lighter than others). Students measure length, mass, capacity and volume with uniform non-standard units such as clothespins, paper clips, pennies, centimeter cubes, or unifix cubes. In 3^{rd} grade, the metric system is introduced as the standard science measurement system.

**Measurement, Classroom Case Studies Grade K-2**

The Annenberg Foundation, www.learner.org

### Signature Lesson

How Many Steps? Illuminations Resources for Teaching Math, NCTM (website) - Students measure distances using non-standard units and record their measurements in a bar graph.

**How Many Steps?**

Illuminations Resources for Teaching Math, NCTM, illuminations.nctm.org

- Supporting Lessons
- Extensions
- Assessment Ideas
- Literature Connections
- Related

TEKS - Additional Resources

### Supporting Lessons

Estimation and Measurement: Science NetLinks (website) - Learn to use unconventional (non-standard) units to estimate and measure.

**Estimation and Measurement**

Science NetLinks, www.sciencenetlinks.com

### Elaboration Lessons and Extensions

Measurement, Classroom Case Studies Grade K-2: The Annenberg Foundation (website) - Learn how to use non-standard units to measure objects.

**Measurement, Classroom Case Studies Grade K-2**

The Annenberg Foundation, www.learner.org

### Assessment Ideas

The Difference Between Formative and Summative Assessments: eHow Family (website) - Assessment provides important feedback regarding student performance and mastery of concepts. Use these methods to inform your instruction.

### Literature Connections

*Super Sand Castle Saturday*. Murphy, Stuart J. (ISBN 0-06-446720-1)

*Measuring Penny*. Leedy, Loreen. (ISBN 0805065725)

*Measurement*. Dowdy, Penny. (ISBN 0778743411)

### Additional Resources

The Effective Detective: PBS Kids (website) - An interactive game in which students use properties to describe characters from the “Arthur” storybook series.

## TEKS Navigation

### Grade 1

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## Comments