Hello once again, Spring is here soon with the last taste of snow last week.  How are PPIF users in the Far East?  May I recommend that to know the series more, use one book of each level with existing student from now.  To have a better understanding of the series, start a new student with PPIF Book One and see her//him through the four books.  You will be amazed.  Voila.  Have enjoyable, relax and fun lessons yet keeping the learning element intact!  I wish you the very best.  Alice Chua