Addition strategies within 10 (or 20) A gold star indicates high-quality, inquiry-based activities that follow the PhET design guidelines.


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Tittel Addition strategies within 10 (or 20)
Beskrivelse This lesson emphasizes explicit representations of addition expressions and solutions. The sim allows for students to solve using Ten Frames, free objects, or a linear representation that can function like a number line. These tools can support various direct modeling and counting strategies. This lesson focuses on the use of the Lab screen specifically because it does not provide immediate feedback regarding the total number of objects. (If feedback is desired, a class could use the Ten screen instead.)
Emne Matematikk
Nivå Barneskole
Type Guided Activity
Varighet 30 minutter
Svar inkludert Nei
Språk English
Nøkkelord add, addition, compose, decompose
Simuleringer Number Play (HTML5)


Forfattere Ian Whitacre, Dom Carorora, Azar Kamaldar
Skole / Organisasjon Florida State University
Lastet opp 11.09.23
Oppdatert 14.10.23