Metric-ominoes Game



Make learning metric prefixes and their corresponding numerical values entertaining and enjoyable with this metric units version of the classic dominoes game.


  • Metric system
  • Metric prefixes
  • Conversion factors


The metric system of measurement is based upon divisions of 10 using the same prefixes for length, mass and volume. Most countries today use this system for all their measurements. Why does the United States still use the English system of measurement? The United States was mainly developed from English heritage, so it ended up with the English measurement system. Several attempts have been to promote the use of the metric system in the United States, but all have failed due to strong public sentiment for the English system. Ironically, the British and their Commonwealth countries now use the metric system of measurement, but the United States, for the most part, still holds onto the English system. One area that does use the metric system as a standard is the field of science. The metric system is the foundation for most measurements and calculations used in all divisions of science. The Metric-ominoes Game will introduce and help strengthen students’ knowledge of the metric system and their ability to carry out conversions between the prefix of a measurement and its corresponding numerical value. The eight most commonly used prefixes—mega, kilo, deka, deci, centi, milli, micro and nano—will be used in this game. A table of the prefixes and their numerical values is listed below, and may be reproduced and given to students if desired.


Conversion table sheet*
Metric-ominos instruction sheet*
Metric-ominos tiles sets, 6*
Metric-ominos tiles set transparency*
Overhead projector
*Materials included in kit.

Safety Precautions

The materials in this kit are considered nonhazardous. Please follow all normal classroom guidelines.

Prelab Preparation

  1. Make a copy of the Metric-ominoes Rules for each student.
  2. Cut out the set of tiles from the transparency. These tiles can be used on an overhead projector to explain the rules and play of the game.
  3. (Optional) Make copies of the conversion table sheet. Cut out the individual conversion tables. These can be given to each student.
    {13945_Preparation_Table_1_Table of Conversion Units}


  1. Divide the students into groups. The group’s size can range from three students to five students.
  2. Hand out a set of Metric-ominoes tiles to each student group and give each student a copy of the game instructions.
  3. Review the game rules with the students.
  4. Go over an example of play using the overhead projector and the transparency tiles.
  5. When ready, instruct students to begin the activity.

Student Worksheet PDF


Teacher Tips

  • The tile cards may be laminated to increase durability and allow for extended use.
  • Enhance the game by giving a prize or extra credit to the student who uses up all of his or her tiles first. Instruct students to start their games simultaneously so there is no unfair time advantage to any group.
  • Students may or may not be allowed to use a conversion table.
  • Use the Table of Conversion Units (Prelab Preparation section) to confirm matches.
  • This activity can be completed in one 50-minute class period.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Using mathematics and computational thinking

Disciplinary Core Ideas

MS-PS1.A: Structure and Properties of Matter
HS-PS1.A: Structure and Properties of Matter

Crosscutting Concepts

Scale, proportion, and quantity

Performance Expectations

MS-PS1-2: Analyze and interpret data on the properties of substances before and after the substances interact to determine if a chemical reaction has occurred.


Flinn Scientific would like to thank Jennifer Burns, Rosemary Camp and Mary Coogan, Liberty High School, Liberty, MO, for their idea for this activity.

Next Generation Science Standards and NGSS are registered trademarks of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of this product, and do not endorse it.