encyclopaedias
Like a CIA factbook meets A formula converter,
http://thinkquest.org/pls/html/think.library
Measurement, go here for all the metric converstions http://www.worldwidemetric.com/
All types of Conversion equations here
http://www.onlineconversion.com/
a large number of conversion, many of them are crazy but ...
http://library.thinkquest.org/16600/reference/units.shtml
Earth, the planet, the encyclopedia
Fix your Bike
http://www.madegood.org/bikes/tutorials/
Human Anatomy
http://www.fourmilab.ch/yoursky/
http://www.gscinternationalinc.com/
I have not bought anything here but It looks value for money
Super Equipment here
some very good stuff including experiments to try
http://www.practicalchemistry.org/
your periodic table
http://www.dartmouth.edu/~chemlab/info/resources/p_table/Periodic.html
Oil Industry energy resource
http://www.classroom-energy.org/
periodic table
http://periodic.lanl.gov/default.htm
Quadratic Solver
http://id.mind.net/~zona/mmts/miscellaneousMath/quadraticRealSolver/quadraticRealSolver.html
A whole bunch of stuff
including number notation, trigonometry and much much more
Your trig identities on the web
http://www.sosmath.com/trig/Trig5/trig5/trig5.html
Data Grapher thanks to Zona (zonalandeducation)
http://zonalandeducation.com/ezGraph/ezGraph.html
Type in the data get the graph
https://www.thephysicsaviary.com/Physics/Programs/Tools/Graphing/index.html
quite easy, gives slope
A whole physics revision set
http://hyperphysics.phy-astr.gsu.edu/Hbase/hframe.html
A nice site which is almost fun, but definitely a good resource
Its Called Fizzics Fizzle
http://library.thinkquest.org/16600/
Revise all your Junior Physics here
http://www.cyberphysics.co.uk/
The physics Syllabus from loretto ballbriggan
http://www.loretobalbriggan.ie/physics/
Electronics Schematics website
Simulations
https://www.vascak.cz/physicsanimations.php
https://www.walter-fendt.de/html5/phen/
http://www.srh.noaa.gov/srh/jetstream/index.htm
For checking your own html,
http://www.play-hookey.com/htmltest/
A site I stumbled upon !
http://www.engineeringpathway.com
HilaRoad Science materials here
How to solder video
http://www.youtube.com/watch?v=6QznAAwL8rI
A collection of science photos
Really cool experiments
http://resources.schoolscience.co.uk/Salters/pdfs/voltwo/SCC2_DemosAll.pdf
Make Magazine!
http://www.ict.mic.ul.ie/tp/teacher_resources.html
http://www.col-ed.org/cur/science.html
http://www.lessonplanspage.com/Science.htm
http://www.webelements.com/webelements/scholar/index.htm
Irish revision site
The UK's Broadcasters education section http://www.bbc.co.uk/schools/
The Irish Dept of Ed & Sci, teacher support service
junior syllabus
http://juniorscience.ie/jsss/Main/Home.htm
Some Talented Youth stuff
Mindmapping online from bubbl.us
SLSS MAG
September09 0909
http://www.bbc.co.uk/schools/ks3bitesize/game/
An excellent Resource
Quizzes and tests based on the Junior Cert Science course
http://www.sciencequiz.net/jcscience/index.html
http://earthquake.usgs.gov/learn/kids/
Great Circles