Physics Classroom
The Physics Classroom: Refraction and the Ray Model of Light: Anatomy of a Lens
Illustrated diagrams in this tutorial help students understand the properties and functions of lenses.
BBC
Bbc: Gcse Bitesize: Lenses
Lenses are precisely shaped pieces of glass that have been developed and used in corrective glasses, telescopes, microscopes, binoculars, and magnifying glasses. They can be convex or concave. Links are provided to a video an a test.
Science Struck
Science Struck: Theory of Plate Tectonics
A detailed discussion of plate tectonics. Looks at continental drift, types of tectonic plates and plate boundaries, and primary and secondary tectonic plates.
CK-12 Foundation
Ck 12: Earth Science: Mountain Building
[Free Registration/Login may be required to access all resource tools.] How mountains are formed as a result of plate tectonic processes.
Khan Academy
Khan Academy: Thin Lens Sign Conventions
Have you ever wondered why some people need glasses and others don't? It's because of the way light is focused by the lens in your eye. This lens, like magnifying glasses, eyeglasses, and contact lenses, is considered a thin lens.
Ducksters
Ducksters: Physics for Kids: Lenses and Light
Kids learn about lenses and light in the science of physics including concave, convex, converging, diverging, focal point, meniscus, and Plano lenses.
Math Words
Math Words: Root Test
Math Word briefly states the root test and discusses when the series is convergent, divergent or does not exist.
Center for Educational Technologies
Cotf: Plate Tectonics
Plate Tectonics provides geology with a comprehensive theory that explains how the Earth works.
Other
Moorland School: Earth Science Zone: Plate Tectonics
A webpage explaining the main features of plate tectonics. Understand what evidence exists for plate tectonics and the theory of Pangea. Also learn about the different types of boundaries. The end of the webpage includes more links that...
PBS
A Science Odyssey: You Try It: Plate Tectonics
Using your computer mouse you can simulate transforming, collisional, divergent and convergent plate boundaries. Descriptions of each plate boundary are also available.
Curated OER
Displaymath243
This lesson discusses the limit of a sequence in mathematics. Compares convergent and divergent sequences and presents numerical and graphical examples.
Curated OER
S.o.s. Math: Sequences Limits
This lesson discusses the limit of a sequence in mathematics. Compares convergent and divergent sequences and presents numerical and graphical examples.
Curated OER
Displaymath253
This lesson discusses the limit of a sequence in mathematics. Compares convergent and divergent sequences and presents numerical and graphical examples.
Curated OER
S.o.s. Math: Sequences Limits
This lesson discusses the limit of a sequence in mathematics. Compares convergent and divergent sequences and presents numerical and graphical examples.
Curated OER
S.o.s. Math: Sequences Limits
This lesson discusses the limit of a sequence in mathematics. Compares convergent and divergent sequences and presents numerical and graphical examples.
Science4Fun
Science4 Fun: Plate Tectonics
What are tectonic plates? Discover how tectonic plates move, the different types, and learn about their boundaries.
Georgia State University
Georgia State University: Hyper Physics: Thin Lens Equation
This is an informative site from Georgia State University. It gives a discussion of the thin lens equation and an illustration of its use in determining the image distance based upon the object distance and the focal length.
Other
Digital Library for Earth System Education: Teaching Box: Plate Tectonics
A suite of lessons focusing on finding the fossil evidence for lithospheric plate tectonics. Inquiry-based exploration of plate tectonics evidence includes fossil distribution, earthquakes, and volcanoes.
Varsity Tutors
Varsity Tutors: Hotmath: Sequences and Series
Hotmath provides 20 practice problems relating to sequences and series. Each of the practice problems include a step-by-step guide for solving.
American Geosciences Institute
American Geosciences Institute: Earth Science Week: A Model of Three Faults
In this lesson plan, students learn about the different kinds of faults and plate boundaries and where they can be found. They research and report on the faults that are present in their state. They are also asked to develop models of...
PBS
Mountain Maker Earth Shaker
This resource gives an introduction to the theory of plate tectonics. It also has animations of four types of plate boundary interactions (convergent, divergent, transforming, collisional).
Other
Sierra College: Summary of Tests for Series
Provides a summary of tests for series that includes the test, series, converges, sum of remainder, and diverges for nth Term, Geometric Series, Telescoping Series, p-Series, Alternating Series, Integral, Root, Ratio, Direct Comparison,...
CK-12 Foundation
Ck 12: Fourth Grade Science: Earth Science: Theory of Plate Tectonics
[Free Registration/Login may be required to access all resource tools.] Discusses what a tectonic plate is and how scientists can recognize its edges, how the plates move by convection in the mantle, the three types of plate boundaries...
Other
India Parenting: Left Brain, Right Brain
India Parenting takes a look at why "I?m creative and he?s analytical" with a discussion of right brain and left brain characteristics.