Thank you both for the encouragement!
To clarify, he has been working on the SW/ULW four days per week, but he has often been completing less than one dictation per week. Some of this is due to attention/effort issues, which we are now addressing. We’ve set a new goal for him to complete two lessons per week, just doing dictation for one of them. He is working on Analytical Grammar this year, too.
Hopefully if we plug along at this rate, he will be proud of his own progression and we’ll work through the book without forcing him to finish in a certain amount of time.