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## Texas Math Sample: Course 1, Unit 4, Activity 17—Understanding Ratios

Explore an activity in which students use models to build conceptual understanding of ratios and apply that understanding to proportional relationships in tabular and graphical representations.

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## Texas Math Sample: Course 2, Unit 3, Activity 8—Ratio and Proportion

Explore Unit 3, in which students use ratios and proportions to analyze financial transactions, calculate the dimensions of a soccer field, and create scale drawings of real-world structures.

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## Texas Math Sample: Course 3, Unit 2, Activity 9—Writing Expressions

Students identify and represent patterns using models, tables, and expressions, and write and evaluate algebraic expressions that represent patterns with constant differences. During the activity, students discuss the concepts with a partner, in groups, and with the entire class. This download includes the teacher instructions and the student handout.

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## Texas Math Sample: Algebra 1, Unit 2, Activity 10—Linear Models

Explore an activity in which students solve problems by gathering real-world data, recording results in tables, and representing results with graphs. They also write function equations and learn to write and use inverse functions.

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## Texas Math Sample: Geometry, Unit 2, Activity 11—Congruence Transformations and Triangle Congruence

Explore an activity in which students explore congruence using a transformational approach, investigate triangle congruence criteria, write proofs for each triangle congruence criterion, and apply congruence criteria in real-world contexts.

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## Texas Math Sample: Algebra 2, Unit 2, Activity 10—Writing Quadratic Equations

Explore an activity in which students explore the relationship between the equation of a parabola and a quadratic function.

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## Texas Math Sample: Precalculus, Unit 4, Activity 25—The Law of Sines

Explore an activity in which students discover mathematical relationships and use the law of sines including cross-curricular connections between math and to aviation.

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