In this activity, you will construct special segments of a triangle named altitudes, medians, and angle bisectors, Using their definitions. You will look at how an altitude, a median, and an angle bisector divide the area of a triangle....

Students explore the properties of triangles formed by connecting the midpoints of two sides of a triangle, and examine the relationship between the two triangles. They study the Triangle Midsegment theorem. [Requires Adobe Reader.]

In this activity, students construct isosceles and equilateral triangles. They discover that if two sides of a triangle are congruent, then the angles opposite them are congruent. They understand that an equilateral triangle is also...

This activity has students discover the relationship between parallel and perpendicular lines and their slopes. After constructing these objects using CABRI Geometry II for the TI-89, slopes are measured. [Requires Adobe Reader.]

In this Computer Algebra System (CAS) activity, students use the statistical, graphical, and symbolic capabilities of the calculator to make it a powerful tool for investigating and developing mathematical concepts. Includes teacher...

Students can use the converse of the Pythagorean Theorem to predict a triangle's classification. The Cabri Jr. App on the TI-83+/84+ family will be used to create triangles and find their measurements. Adobe PDF lab worksheets are included.

This lesson introduces students to Activity Center and is intended to help students interpret whether lines are parallel or perpendicular. [Requires Adobe Reader.]

Students can use these practice exams to prepare for the 10th grade Science exam. Includes PDF (requires Adobe Reader).

The study of properties of right triangles is a major topic in mathematics. In this activity, you will investigate three common right triangle trigonometric ratios. [Requires Adobe Reader.]

Students discover properties of rotations using the TI-89 and CABRI Geometry II by rotating a triangle around a point and through a specified angle. They will discover the definition of a rotation. [Requires Adobe Reader.]

In this activity, students compute the circumference and area of circles. They understand that the ratio of the circumference to the diameter is a value called pi. [Requires Adobe Reader.]

The centroid, circumcenter, orthocenter, and incenter are the four classic centers of a triangle that are studied in geometry. In this activity, you will construct these center points and discover their properties. [Requires Adobe Reader.]

In this activity, students will extend their understanding of midsegments by investigating the midsegments of a quadrilateral and the midsegment quadrilateral. [Requires Adobe Reader.]

In this activity, students will determine if two sides of a pyramid are perpendicular. [Requires Adobe Reader.]

This activity focuses on the properties of special quadrilaterals. [Requires Adobe Reader.]

This brief activity clarifies to use Bayes' Rule and conditional probability to narrow down searches. Students then have the opportunity to calculate some conditional probabilities using the same technique. Graphing calculator technology...

In this Computer Algebra System (CAS) activity, students use 'landscape' paper and fold the top left corner of the page so that it just touches the bottom of the page. They calculate the area of the triangle formed by the bottom left...

In this activity, students use the Geoboard to determine the length of the sides of a right triangles. [Requires Adobe Reader.]

In this activity, students describe how to move a shape from one place to another in a plane. They learn about translations, rotations, and line reflections. [Requires Adobe Reader.]

This activity provides students an opportunity to explore the relationship between the diameter of a circle and its circumference. [Requires Adobe Reader.]

This essay describes a natural pesticide, BT, and calls for its use over that of dangerous synthetic pesticides. Requires Adobe Reader. [PDF]

The purpose of this lesson is to learn about the different types of simple machines and their uses. PDF (requires Adobe Reader) and RTF (requires Word or Notebook).

This is a great three-page printable resource to help middle school students write a report on a biography. Touches on six questions to derive at elements of the biography. Requires Adobe Reader. [PDF]

This unit is focused on helping young scholars understand resources for solving and preventing crime. They compare crime prevention methods of today and in the past, take part in simulation exercises, and participate in a service...