Hi, here are some resources I think are good. First of all this website, MES English, has a lot of great material. You could pick a topic, find some flash cards, and maybe even a worksheet to go along. Introduce the students to the vocabulary, and have them do a worksheet. If they are older students, introduce some phrases. For example, if you are teaching clothing, introduce "Put on your hat", or "Do you have a hat?"
Also, I would try to do some writing. Again MES English has some great resources for this. Check out the Phonics link.
For the younger grades, I use songs, and tie that in with the vocabulary. You can check out my site for many topics and lesson plans:
http://www.dreamenglish.com
Also, Genki English has great resources for teaching Elementary School children, so definitely have a look there. There are curriculum lesson plan links on the home page:
http://www.genkienglish.net/
I know this doesn't answer your question specifically for Grade 1-6 lesson plans, but I hope it helps.
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