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- Images should typically be no more than a few hundred KB. If your image is larger than this it should be resized and/or compressed.
- Resize the picture *before *you upload it - making it smaller once it's uploaded will mean the file size will be larger than necessary.
A typical size for websites would be 450x300 pixels for a medium sized image. - Save photographs as JPEG (you can choose to save at a lower quality to reduce filer size)
- Save illustrations and drawings as GIF or PNG.
- If you want to allow students to see a photo in high quality consider adding a thumbnail that links to the full-size, high quality image, so they can choose to download it when appropriate.
Compressing images using Microsoft Picture Manager (Windows only):http://www.youtube.com/watch?v=ms8drQpgHYA