If you are teaching the properties of fluids and the properties of air at the elementary level, the web site "Air Travelers" will certainly be a good source of ideas then planning your lessons. It will provide you activities to explore buoyancy, the properties of hot air, the properties of helium and the effect of wind on a balloon. There is also a guide in PDF to build a hot hair balloon with all the details. There is a teacher guide and well as a section providing the science background information to truly understand hot air balloons. In the gallery section, you can watch pictures and videos of hot air balloons.

If you are teaching English as a second language, this site, "English Grammar Quizzes in Javascript", will be good practice for your students. It contains tons of computerized little quizzes to test their knowledge of the English Grammar. It is all multiple choice and the student gets immediate feedback after he or she answered. It covers many concepts of the English grammar including nouns, verbs, pronouns, punctuation, misplaced words, prepositions, participles, etc. It comes with five level of difficulty : easy, easy to medium, medium, medium to difficult and difficult. All the quizzes are written in JavaScript, so they should run easily in your web browser.

If you teach in Ontario in grade 9, 10 or 11 in one of the following subjects, this "Curriculum Material for the Ontario Curriculum" website will certainly be very valuable for you : Science, Language, Physical Education, Technology, Mathematics, Native Studies. The website contains Unit Plans, Worksheets, Assignments, Organizers, Rubrics, Checklists & Scales, Tests & Exams and more. All the documents and worksheets are available in MS-Word Format, so you can easily modify them to suit the needs of your students. For some of the courses, almost all the units are covered, but some courses are incomplete. As an example, the geography grade 9 course has over 50 photocopy ready worksheets. Even if you don't teach in Ontario, you may find some documents that will be useful and will match the curriculum in your state, province or country.

"Graphic Organizers" is a great website offering printable graphic organizers in Word or PDF format. Using those tools, students will be able to better organize their ideas when writing text. They can also use those graphic organizers to sort their knowledge in mathematics, science and social studies. There are over 70 organizers that you may download for free on that website.

Graphics organizers may be used to sort information, to compare and contrast, to research, to study, to sequence, to create a hierarchy, to determine cause and effect and to present concepts. Some of the organizers available on this website include : Two-Way and Three-Way Venn diagrams, Spider Web, Who/What/When/Why/How/Where, Compare and Contrast Charts, Comparing Maps, T-Chart, Source Cards, Boolean Search, Research Planning, Division of Labour Chart, Cycle Chart, Event Sequencing, Branching, etc.

The Exploratorium is the museum of science, art and human perception in San Francisco. Since most of us live far from the museum, they have a section called "Snacks". However, they're not the kind you eat. They're the kind you can learn from and have fun with. Exploratorium Science Snacks are miniature versions of some of the most popular exhibits at the Exploratorium.

These "snaks" are short experiments that can easily be presented as demo in your classroom. They require material that is very easy to find. They include perception experiments as well as physics and earth science experiments. Students can explore colours, mirrors, Bernoulli's principle, blind spot, center of gravity, magnetism, resonance, electroscope, geyser, batteries, pendulums, peripheral vision, pinhole camera, resonators, spectra, motors, vectors and many more. Each experiment includes material, assembly steps, what to do and notice and an explanation of what is going on.