Although it's a site of a Kindergarten teacher, she shows lots of ideas from Debbie Diller's Math Workstations book good for first grade too.
Nursery rhyme activities
lots of classroom management ideas--I'm completely obsessed with this girl's blog
Meet the Shapes FREEBIE
15 books with a clever craft for each one.
Living and Non-Living Things (PDF)
Story Sequencing with "The Little Old Lady Who Was Not Afraid of Anything"
Pinterest Link-UP for Educational Pinners