The purpose of this task is to help students see manipulation of expressions as an activity undertaken for a purpose.

This activity is a classroom investigation where students predict, explore and evaluate what happens to water as it travels through the water cycle.

By presenting the students with fossils and other earth materials and giving clues as to their origin, they will be able to identify the fossils and materials and be able to form a hypothesis as to how they were formed and what it was before preservation.

Spreadsheets Across Curriculum module. Students build spreadsheets to examine the price of gasoline, 1978-2005. QL: using ratios and proportions to make comparisons.

The students will investigate how one liquid will change the color of another.

This activity allows students to deduce part of Newton's Law of Inertia that states an object in motion will stay in a straight line motion unless an outside force acts on it.

The purpose of this task is to probe students' ability to correlate symbolic statements about a function using function notation with a graph of the function, and to interpret their answers in terms of the quantities between which the function describes a relationship

This is a guided inquiry discussion to introduce machines and to identify types of simple machines

Students will create and investigate testable questions about how basil changes based on growing conditions.

During this activity, students will investigate leech behavior. Students will learn to ask a question about leech behavior that can be investigated.

In this hands-on inquiry activity, students will design and construct an apparatus that will permit an egg to survive a nine foot fall. Students are given limited materials, so they must critically think about the design and improvise strategies during the building of the apparatus

This task shows how to inscribe a circle in a triangle using angle bisectors. A companion task, ``Inscribing a circle in a triangle II'' stresses the auxiliary remarkable fact that comes out of this task, namely that the three angle bisectors of triangle ABC all meet in the point O.

This task is primarily for instructive purposes but can be used for assessment as well. Parts (a) and (b) are good applications of geometric constructions using a compass and could be used for assessment purposes but the process is a bit long since there are six triangles which need to be constructed.

This task provides an opportunity for students to apply triangle congruence theorems in an explicit, interesting context.

This problem introduces the circumcenter of a triangle and shows how it can be used to inscribe the triangle in a circle. It also shows that there cannot be more than one circumcenter.

This task focuses on a remarkable fact which comes out of the construction of the inscribed circle in a triangle: the angle bisectors of the three angles of triangle ABC all meet in a point.

In this task students are asked to label negative numbers on a numberline and then answer questions about which are greater or less than.

This ITS ePrimer provides transportation professionals with fundamental concepts and practices related to ITS technologies. This resource can help practicing professionals and students better understand how ITS is integrated into the planning, design, deployment, and operations of surface transportation systems. The ePrimer is both a stand-alone reference document for the practitioner as well as a text for education and training programs.

The applets in this Interactive Geometry Dictionary (IGD) will allow students an opportunity to explore finding the area of some common shapes. The applets demonstrate how to find the area of a triangle using the area of a parallelogram, which in turn can be found using the area of a rectangle. This tool also supports the lesson "What's My Area" cataloged separately.

This is a set of interactive lecture demonstration questions designed to probe student understanding of single-slit diffraction.