Highlighted Interactives at NCTM Illuminations

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Pre-K–Grade 2 Interactive: How Many Under the Shell?

Practice addition and subtraction with Okta.

Grades 3–5 Interactive: Turtle Pond

Guide a turtle to the pond using computer commands.

Grades 6–8 Interactive: Free Ride

Explore fractions using the context of a bicycle and gear ratios.

Grades 9–12 Interactive: Pi Fight

Become comfortable using both radians and degrees.