Website
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Math Across the Curriculum: Art and Linear Perspective

For Students 9th - 10th Standards
This website contains an easy to understand explanation of vanishing point and other concepts of linear perspective.
Handout
National Council of Teachers of Mathematics

The Math Forum: Perspective Drawing

For Students 9th - 10th
This site discusses vanishing point and perspective drawing, including tips on drawing from various perspectives.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: F Le Choosing an Appropriate Growth Model

For Teachers 9th - 10th Standards
The goal of this task is to examine some population data for large cities from a modeling perspective. Learners are asked to decide if the population data can be accurately modeled by a linear, quadratic, and/or exponential function, and...