We have been using Sequential Spelling for 3 weeks now and have really enjoyed it! I ended up donating this particular book because I had ordered the Student Response Book too... you don't need both. This book has an extra page each day for a spot to write sentences or do an activity, but I found we didn't need it. I preferred the response book for just writing the words, plus it was a lot smaller and not so bulky.
I have just started using Sequential spelling this year. I really like it! Its all about the spelling! My son struggles to read and spell. This kind of learning makes a lot of sense to him and he is picking it up easily.
I was mislead after reading the reviews, though CBD has clearly stated the spelling lists your child will work from are not included in the Student Workbook. You must have the Teacher's Guide because they contain the lists of words for each lesson.
I got this spelling book because it was recommended through Sonlight. We hated it. It was only a matter of weeks before we tossed it aside and ordered All About Spelling. Sequential Spelling just teaches memorization of spelling words through word families - but not all word families follow the same rules. There's no explaination for why some words are spelled a certain way.
All About Spelling teaches how to spell a word and why words are spelled the way they are spelled. It has helped my kids become good spellers so much better than Sequential Spelling.