Most important are the ones in the middle of the list coded with a black circle. The first ones, marked with an open square, are more fundamental, and should be done first if the students are doing them all. The last ones, marked with an open diamond, are extra activities for challenge or interest. These should be kept for last. Since the slower students might rarely have the pleasure of doing these, try to provide occasional opportunity for them to do the extras too.
The Practice Sheets are categorized by skill. The list for each day in the Teacher's Manual names the skill and the number of that worksheet within that skill category. On the practice sheet itself, the lesson number is given in the oval at the top of the page.
These numbers correspond to the recommended listing in the Teacher's Manual, but practice sheets are intended to be flexible. Use them according to your best purposes.
Some frequently used practice sheets are called Forms, they are distinguished by capital letters.