Do you want just science curriculum or curriculum for other subjects as well?
DS6 was "1st grader" last year and we used CyberEd Earth & Space Science (middle school material). We will use CyberEd Life Science together with Singapore Science (My Pals Are Here).
I don't know VA requirements but I would think you could list any science oriented book - animal encyclopedia, weather encyclopedia, etc. What is your child interested in? Animals? Universe? Chemistry? I would follow his interests and create a science curriculum based on it.
