Scientific Method Simulation
https://glacier.gc.maricopa.edu/biology/scientific_method/index.cfm

Online Explorations
http://www.mhhe.com/biosci/genbio/biolink/j_explorations/explorations.html
alternate link 1
alternate link 2
Dr. Johnson’s OnLine Labs (Johnson Explorations)
I nteractive simulations for high school biology classes

BioLabs
http://www.biocourse.com/mhhe/bcc/domains/biolabs.xsp

Genetics Web Labs
http://www2.edc.org/weblabs/WebLabDirectory1.html
wide variety of genetics simulations and problems
some are appropriate for middle school genetics
most are appropriate for high school genetics

More Genetics Labs OnLine
http://www.paulding.k12.ga.us/curriculum/science/genetics.htm

Virtual Peppered Moths
http://www.biologycorner.com/worksheets/pepperedmoth.html

Microscopy OnLine
There are several good Virtual Microscope Labs, some which allow you to change slides, focus, and change magnification!
http://www.udel.edu/Biology/ketcham/microscope/scope.html
http://www.thinktechnologies.com/portfolio/demos/microscope.html
http://micro.magnet.fsu.edu/primer/java/electronmicroscopy/magnify1/index.html
http://biog-101-104.bio.cornell.edu/biog101_104/tutorials/protista.html
http://www.microscopy-uk.org.uk/ponddip/

TryScience.com
Variety of online experiments. Gel Electrophoresis one is great!
http://www.tryscience.com/experiments/experiments_home.html

The Biology Place Classic Edition
This is a free website appropriate for regular and advanced biology.
The LabBench corresponds to the AP Biology Labs!
http://www.phschool.com/science/biology_place/index.html

ExploreLearning: Gizmos
http://www.explorelearning.com/

Virtual DNA labs
http://bioteach.ubc.ca/TeachingResources/DoingScience/VirtualLabDNATangEtal.htm
http://gslc.genetics.utah.edu/units/activities/extraction/
http://www.nature.ca/genome/index_e.cfm

Genetic Science Research Center Learning Activities
http://gslc.genetics.utah.edu/

Plants and Plant Growth
http://cycas.cornell.edu/ebp/projects/laststraw/ise/home.html
http://isotope.bti.cornell.edu/webcam/webcam.html
http://gslc.genetics.utah.edu/units/biotech/gel/
http://gslc.genetics.utah.edu/units/cloning/clickandclone/

Evolution
http://darwin.eeb.uconn.edu/simulations/jdk1.0/drift.html
http://darwin.eeb.uconn.edu/simulations/selection.html
http://darwin.eeb.uconn.edu/simulations/simulations.html
http://www.museevirtuel.ca/Exhibitions/Dinos/English/home/home.html
http://www.indiana.edu/~ensiweb/home.html

Animal Behavior
http://eebweb.arizona.edu/Animal_Behavior/

Marine Life
Shed Acquarium
http://www.sheddaquarium.org/sea/

Human Body Systems
http://wnt.utexas.edu/~eskeletons/
http://www.bbc.co.uk/science/humanbody/
http://www.kumc.edu/instruction/medicine/anatomy/histoweb/

Virtual Dissections
http://curry.edschool.virginia.edu/go/frog/
http://www.froguts.com/flash_content/index.html
http://bio.bd.psu.edu/cat/
http://www.whitman.edu/biology/vpd/main.html
http://www.kidwings.com/owlpellets/index.htm

Population Growth Simulations
http://arcytech.org/java/population/index.html
http://sciris.shu.edu/thinklets/Biology/
http://www.ecobeaker.com/index.html

Wisconsin Online Learning Objects
http://www.wisconline.org/

Blood Type Game
http://nobelprize.org/educational_games/medicine/landsteiner/landsteiner.html
In this interactive game you can learn about blood types and also determine what type an accident victim needs for a transfusion!

And more.......These are appropriate for AP Biology and beyond
http://highered.mcgraw-hill.com/sites/0073031208/student_view0/virtual_labs.html
http://www.mhhe.com/biosci/genbio/raven6/lab1/labs/lab1/home.html
http://www.hhmi.org/biointeractive/vlabs/index.html
http://www.biocourse.com/mhhe/bcc

Engineer a Crop
http://www.pbs.org/wgbh/harvest/engineer/
PBS interactive site where students can compare traditional and transgenic methods of selective breeding.

Illuminating Photosynthesis
http://www.pbs.org/wgbh/nova/methuselah/phot_flash.html
Also from PBS, a good interactive tutorial about photosynthesis...not a lab activity.

Medical Mysteries
http://medmyst.rice.edu/
Solve medical mysteries while learning about diseases and their causes

Virtual Autopsy
http://www.le.ac.uk/pa/teach/va/howto.html

Chemistry

ChemLab
There is a fee for this one, but it is well worth the price! They are truly interactive and you can design your own simulations!
Go to the downloads page for a free evaluation trial
http://modelscience.com/

Dartmouth ChemLab
This site has some very good interactive virtual labs plus a terrific interactive periodic table!
http://www.dartmouth.edu/%7Echemlab/

Virtual Chemistry
http://www.chm.davidson.edu/ChemistryApplets/index.html
Chemistry and Physics applets and phylsets from Davidson University. You can also download and use on your own webpages.

Virtual Chemistry Lab
http://www.chem.ox.ac.uk/vrchemistry/
This site has virtual experiments as well as webcasts on chemistry topics.

Iridium Project
Virtual Chem Lab....java applet to download
Very interactive!
http://www.chemcollective.org/applets/vlab.php
http://ir.chem.cmu.edu/irproject/

PreUniversity Chemistry Course online from the UK
text and simulations
http://www.chem.ox.ac.uk/vrchemistry/

Oxford Chemistry Film Studio
http://www.chem.ox.ac.uk/vrchemistry/FilmStudio/fsintro.htm

Simulations/Virtual Lab
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/animationsindex.htm

Balancing Equations
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/animationsindex.htm
http://www.studyworksonline.com/cda/content/explorations/0,,NAV2-100_SEP1315,00.shtml

pH meter
http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/acidbasepH/ph_meter.html

Chemistry Homework: Interactive Tutorials
http://chemistry2.csudh.edu/homework/hwintro.html
Everything from significant figures to quantum numbers, gas laws, thermodynamics, nomemclature, all in interactive tutorial forma. Instant feedback!

ChemSketch Freeware
http://www.acdlabs.com/download/

and more..........
http://cse.edc.org/products/simulations/alignedchart.asp
http://library.thinkquest.org/C001258/flashpage.php%3ft=1083243455?tqskip1=1

Virtual Chemistry Book
http://www.chem1.com/acad/webtext/virtualtextbook.html
Not really an online lab, but has pdf and web files on all major concepts in chemistry with excellent graphics. It also has tutorials on selected topics such as redox reactions, acid-base titrations, and aquatic chemistry.

Chemistry Java Applets
http://www.edinformatics.com/il/il_chem.htm
This site is a hotlist of links to interactive chemistry sites. Some are stand alone and some come with lesson plans and teachers' notes.

Biochemistry Java Applets
http://www.edinformatics.com/il/il_biochem.htm
This site is a companion to the one above. It has a hotlist of links to interactive biochemistry sites.

General Chemistry Jeopardy Games
http://chemed.chem.pitt.edu/Jeopardy/genchem/index.htm

Chemistry Film Studio
http://www.chem.ox.ac.uk/vrchemistry/FilmStudio/fshome.htm
Films and demonsrations of common chemical reactions.

Virtual ChemLab Community
http://chemlab.byu.edu/
Resources, support, and discussion board for users of Virtual ChemLab.
You can share worksheets for this virtual chemistry lab environment as well as download the labbooks for regular, honors, and AP Chemistry.

Physics

Physics Classroom
http://www.physicsclassroom.com/

Fear of Physics
http://www.fearofphysics.com/

Physics Place
There is a fee for this site, but it is well worth it!
http://occawlonline.pearsoned.com/bookbind/pubbooks/physicsplace/chapter1/deluxe.html

Physics Applets
http://jersey.uoregon.edu/vlab/

UCLA ephysics
http://ephysics.physics.ucla.edu/
http://www.physics.ucla.edu/demoweb/

Online Physics Textbook
http://dept.physics.upenn.edu/courses/gladney/mathphys/Contents.html

And more..............
http://www.phy.ntnu.edu.tw/ntnujava/

Physics Applets
http://www.edinformatics.com/il/il_physics.htm
This site is a hotlist of links to lots of interactive physics applets!

Earth Science/Geology

Virtual Geology
http://vcourseware.calstatela.edu/GLOL/

Earthquakes
http://vcourseware.calstatela.edu/eec/Earthquake/main.php

Earthquake Simulator
http://dsc.discovery.com/anthology/unsolvedhistory/earthquake/interactive/interactive.html

San Andreas Fault
http://quake.usgs.gov/kap/

Geology Day Trip--San Diego, CA
http://www.miracosta.cc.ca.us/home/cmetzler/GeolDayTrip/geo_top.html

Interactive Earth and Space Science Applets
http://www.edinformatics.com/il/il_earth.htm
This site is a hotlist of applets for earth and space sciences.

Astronomy/Space Science

Google Earth
http://earth.google.com/

Solar System Simulator
http://space.jpl.nasa.gov/

Virtual Solar System
http://www.nationalgeographic.com/solarsystem/

Build a Solar System
http://www.exploratorium.edu/ronh/solar_system/

Math and Data Analysis

Create a Graph
graph data online
http://nces.ed.gov/nceskids/graphing/

GraphPad
graph data online
http://antoine.frostburg.edu/cgi-bin/senese/graphpad.cgi

Graph Paper
Download this freeware program and you can create lots of different types of graph paper!
http://www.mathematicshelpcentral.com/graph_paper.htm

Calculator Applets
http://www.edinformatics.com/il/il_calculators.htm
This site has a list of interactive calculators including a Roman Numerals calculator, a graphing applet, and a virtual abacus as well as a scientific conversions applet.

InspireData
http://www.inspiration.com/productinfo/inspiredata/index.cfm
Not an interactive site, but a terrific data analysis software tool, by the developers of Inspiration and Kidspiration. You can download a free 30-day trial!

General Links

The Interactive Library
http://www.edinformatics.com/il/il_chem.htm
This site is a hotlist of links to interactive activities

NetLogos Library
http://ccl.northwestern.edu/netlogo/models/
A series of simulations in several science fields that you can download or use via a browser.