These are "Item Samplers." Scroll down and click on the green button for reading or math item samplers to practice online. Next, choose the grade you wish to practice. This is only practice. You will not be scored.
Click on McGraw-McHill Reading Wonders- 3rd Grade to find Spelling, Vocabulary, and Writing Resources by Unit. You can also try out Spelling City which you will find scrolling to the bottom after you click on a 3rd Grade Unit. The spelling words for the Reading Wonders stories are already entered. Click on "Free" for spelling activities that work right away. If you have Adobe Flash you can click on Spelling, Vocabulary, Phonics; probably anything!