If your child wants to do “spelling” list or learn words her peers are using here are a couple of great sites that let you print off spelling list by grade.
The Ayers Spelling Scale was originally published in 1915 by Leonard Porter Ayers. It contains the 1000 most frequently used words.
Dolch Word List contains the 220 most frequently used words.
http://www.all-about-spelling.com/free-spelling-lists.html has spelling lists organized by grade.
Kids Spell does not list words and lesson plans by grade but they do have excellent lessons to learn diphthongs and have some good vocab sheets to print off.
Super Teacher has some good free lists to print off initially – you can also buy some of their plans.
aaaSpell.com has lots of free lessons plans for spelling by grade.