# Another Energizer for Number Flexibility

This energizer is called Rule of the Day.  The teacher states a rule like:

Doubles,

Doubles Plus 1

Half Facts

Ten More

Ten Less

Multiples

Then the game begins.  The teacher says a number and the students have to answer following the rule.  For example, if the teacher said, the rule is “Half Facts” the starter number is 20 then students would say 10, 5, 2.5 depending on the grade level.  If the prompt is doubling and the starter number was 50 the students would say 100,200,400 etc.

This can be a fun, energetic, academically rigorous game that gets students very flexible with math facts.  Look at your standards and pick your rules based on what the students need to know!

*See ThinkMath for more on this energizer!

Happy Mathing,

Dr. Nicki

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## One Response to “Another Energizer for Number Flexibility”

Hi Dr. Nicki,
Fact fluency and, ultimately, fact automaticity is essential for the rigor that the Common Core recommends at each grade level. This is a fun and “no pressure” way to learn facts. Think Math has some great resources – thanks for this one.

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