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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Sernav Addition strategies within 10 (or 20)
Danasîn 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.)
Mijar Bîrkarî
Ast K-5
Cure Guided Activity
Dem 30 xulek
Bersîvan Dihewîne Na
Ziman Îngilizî
Peyvên Girîng add, addition, compose, decompose
Şêwekar Number Play (HTML5)


Nivîskar Ian Whitacre, Dom Carorora, Azar Kamaldar
Dibistan / Organîzasyon Florida State University
Şandin 9/11/23
Rojanekirin 10/14/23