Arizona Game and Fish Department: Focus Wild Arizona Activity Sheets - State Symbols 2: State Birds
Arizona Game and Fish Department

In 1931, the Legislature selected the cactus wren to be the official state bird of Arizona.

https://sites.google.com/view/focuswildactivitysheets
Illuminations: Supreme Court Handshake
Illuminations (National Council of Teachers of Mathematics)

During this lesson, students will explore the handshake problem, a classic problem in mathematics that asks, “How many handshakes occur when n people shake hands with each other?”

https://illuminations.nctm.org/Lesson.aspx?id=2112