Please note: All sales are final. Due to limited inventory and shipping support, we’re unable to accommodate returns, exchanges, or changes to orders once they have been placed. Thank you for your understanding! This matching card set is designed for students to work with degrees and radians, positive and negative angles, along with sine, cosine, tangent, and their inverses. There are thirteen card sets in all, each referenced in Teaching Algebra to the Adolescent: A Montessori Approach – Volume 2.

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