PBS
Pbs Learning Media: Logical Leaps: Rational Numbers on the Number Line
In this interactive, use logic to solve riddles involving a wallaby jumping contest.
Illustrative Mathematics
Illustrative Mathematics: 7.rp Dueling Candidates
Seventh graders use proportional reasoning to solve word problems regarding an election.
Illustrative Mathematics
Illustrative Mathematics: 7.rp Sale!
Seventh graders are using proportional reasoning to solve real world problems in this lesson.
History of Computing Science
History of Computing Science: The Turing Machine
A Turing Machine is not an actual machine, but rather a symbolic system that can be used to represent any algorithm used to solve a problem. This lecture series gives a very brief description of the Turing Machine.
Indiana University
Indiana University: Science vs. Non Science
This mini-lesson at the Evolution and Nature of Science Institute site from Indiana University provides a criteria by which students can evaluate an idea or explanation for scientific credibility.
Math Slice
Math Slice: Online Mathematics Practice (Mock) Tests for Grades 4 Through 5
A collection of mock math tests, designed for grades 3-5, modeled after portions of standardized tests.