Primary Mathematics US Edition has been great for my homeschoolers. The curriculum is well organized and thorough, and the methodology has helped my children develop a solid grasp of mathematics and the base-10 number system. Dimensions Math 6 was also great, with a very helpful teacher's manual to accompany the curriculum. Dimensions Math 7 has a well written textbook, though we have discovered a few printing errors that made certain portions confusing. And there is no accompanying teacher's manual, only a solutions manual. A teacher's manual with a guide to instruction would be a huge help in teaching and dividing the material into digestible lessons. I hope the company will consider making one for Dimensions 7 and 8 in the future.