I originally suggested using MS Word or other similar software to create your blog post project on Light and Color, and then copying to Blogger when you were ready to post. Many students have been struggling with this, especially around the issue of graphics and images.
I ran across one solution that helps a little, and I'm using it to create this post. It's an application called Windows Live Writer that you need to download and install on your computer. You will also need a Windows Live account, if you don't already have one.
Once you have it installed, you can use the "Add Weblog" function to add your class blog as the publishing destination. Stop by for help if you are interested.
Here is a simple cut and paste inserting an image:
Here is an example using one of the other features of Live Writer - The insert map function, locating our school