Here I will add links to some K-6 classroom blogs I have come across. (As northern hemisphere students are on summer break, more new class blogs will be added from these parts after September)

A good way to be notified of a blog's updates are to subscribe to them via an RSS feeder such as Google Reader.

Information about Kim Pericles Belmore South blog (Sydney).
The school's blog 08 Allstars.

Georgia's Year 4 class blog from Sydney.

Grace's Year 3 class blog from Sydney.

Mrs.C's 5/6C class blog from country Victoria.

Mrs. Wyatt's year 6/7 class blog Technology in our Classroom from Tasmania.

Meadowbank Room 23 year 2 class blog from New Zealand.

Room 1's blog - year 1 in Nelson, New Zealand.

Grade 3 BlogPals from Bangkok.

Mr. P's Senior blogs from Victoria.

Mrs. Lowe's Area 11 bloggers I believe are from Western Australia.