Students are graded about every 3 weeks on Longfellow's kindergarten, 1st grade and 2nd grade spelling words. Here is the sight word chart: http://embedit.in/OKuzhFlBoj.swf
The students also learn about spelling patterns in Words Their Way. The students take a test on these words every few weeks as well. These spelling lists are also studied during reading time to support phonics instruction.
Here is a link with fun ways to practice spelling with your student: 60 Ways To Practice Spelling