Since levels C and D build systematically on and presume knowledge of phonograms, spelling rules, phonemic awareness, morphological knowledge, and other linguistic tools taught in previous levels, these levels will not work as starting points. Over the course of Foundations students learn all 75 basic phonograms used in English words, as well as 19 spelling rules, and many of these that students will need for advanced words are taught in levels B and C.
However, it may be appropriate to skip level A and move very quickly through B with children who are already reading.
Older children who are new to LOE should start at Essentials, which teaches all the phonograms and spelling rules and is designed to meet the needs of students age eight and up.
School implementation note: First and Second Grade options
For schools transitioning to Logic of English, in the initial year we recommend teaching First Graders either Foundations B and C (beginning D if time allows), or Foundations A, B, and all or part of C. Which one will be a better fit depends on the phonics, handwriting, and phonemic awareness skills of the incoming first grade students. If starting at B, plan to spend a few weeks reviewing the sounds of the A-Z to phonograms, and how to write the lowercase letters, at the start of the year before digging into the B lessons.
In subsequent years, first grade students who have had Foundations in kindergarten can use Foundations B and C or Foundations C and D, depending on whether they completed B and their level of mastery of these skills.
If using Foundations in Second Grade, plan to begin the initial year of implementation with a very quick review of Level B to introduce phonograms, rules, and linguistic concepts it teaches, since students will need to know these concepts for reading and spelling in C and D. Then teach all of C and part or all of D, as your pace allows. In future years, begin wherever first grade left off in C or D.
Another option for Second Grade is Essentials. Essentials will likely be a better fit if most of your students begin second grade already reading comfortably and ready to put a greater focus on spelling and grammar.
On the other hand, if you have incoming second graders with very weak reading, phonemic awareness, and handwriting skills, you may also want to consider reviewing Foundations A before starting B.