What can we make of the massive amount of crime statistics collected in major cities? Beyond just reporting numbers, how can we use these data to determine the safeness of a city?

The goal of this task is to help students synthesize their knowledge of triangles.

This task has students create equations to model a physical scenario, and then reason with those equations to come up with a solution.

Find some pre-made number tents for integers and degrees, as well as a blank set of number tents to create your own number tents.

Premade number tents to use clothesline math with linear, exponential and trignometric functions.

Want to know how to set up clothesline math in your classroom? Read this post and find a few different methods. Then, choose which one works best for your classroom culture.

This task is intended for instructional purposes as an interesting activity which could accompany the other ''Seven Circles'' tasks. If it precedes these tasks, then the focus should be on recording information and looking for patterns.

Open Middle provides math problems that have a closed beginning, a closed end, and an open middle. This means that there are multiple ways to approach and ultimately solve the problems. Open middle problems generally require a higher Depth of Knowledge than most problems that assess procedural and conceptual understanding.

Open Middle provides math problems that have a closed beginning, a closed end, and an open middle. This means that there are multiple ways to approach and ultimately solve the problems. Open middle problems generally require a higher Depth of Knowledge than most problems that assess procedural and conceptual understanding.

The primary purpose of this problem is to rewrite simple rational expressions in different forms to exhibit different aspects of the expression, in the context of a relevant real-world context (the fuel efficiency of of a car).

This lesson unit is intended to help you assess how well students are able to interpret exponential and linear functions.

The goal of this task is to solve quadratic equations with complex roots by completing the square. Students could of course directly use the quadratic formula, but going through the process of completing the square helps reinforce the mathematics behind the quadratic formula.

Triangle congruence criteria have been part of the geometry curriculum for centuries. For quadrilaterals, on the other hand, these nice tests seem to be lacking. This task addresses this issue for a specific class of quadrilaterals, namely parallelograms.

The goal of this task is to understand similarity as a natural extension of congruence.

The goal of this task is to establish that base angles in an isosceles triangle are congruent.

The goal of this task is to prove congruence of vertical angles made by two intersecting lines and alternate interior angles made by two parallel lines cut by a transverse.

The goal of this task is to estimate the measure of angles in triangles with integer side lengths.

The purpose of this task it to use geometry and algebra in order to understand the behavior of the trigonometric function f(x)=sinx+cosx. The task has been stated in an open ended fashion as there are natural solutions using geometry, or using the trigonometric identity sin2x=2sinxcosx, or algebraically solving a system of equations.

The purpose of this Illustrative Mathematics task is to examine angles of triangles whose vertices have specific integer coordinates.