Free Online Kindergarten/First Grade

Good feedback is coming in about Learning Lynx "Awakening Woods" Curriculum (which I use for my Kindergartners, but could work for first graders, too). Free, online, and complete, including art, music, math, language arts, history, grammar, science, social studies, and more....and it's fun! If you haven't checked it out yet, you can find it here: https://sites.google.com/site/learninglynxclassroom/awakeningwoods/month-1/k-day-01

Reading "motivator" program

Created by Sylvan Learning Centers, Book Adventures is a place you can register (free) and take quizzes on books (K-8th) to compete with other students or win prizes.

http://www.bookadventure.com/Home.aspx

Grammar and Punctuation course

This is a well-done course for middle school through college. It hits mostly on the places most people make errors (so you won't be placing periods at the ends of sentences here). There are lessons and online exercises with instant feedback.

http://www.bristol.ac.uk/arts/exercises/grammar/grammar_tutorial/page_41.htm

K-6 Language arts workbooks

Three levels for each grade, in .pdf format

http://www.macmillanmh.com/languagearts/2001/teacher/teachres/workbooks.html

and for Grammar, literature, and spelling:  http://www.mhschool.com/reading/treasure_workbooks/national.html

Animated Tech lessons

http://activities.macmillanmh.com/Techknowledge/TKMacmillan.php

Some of these are outdated, but some are still very useful.