Thank you for your question!
The beauty about CHC's lesson plans is that they are flexible according to you and your student's needs. You can start during the middle of the school year.
Unlike other programs, CHC does not require daily, weekly, monthly or even yearly assessments. They want the student to be responsible for his own learning, without the pressure of deadlines and continuous reports/assessments. It's fine to begin in the second half of the school year if you are comfortable doing so. My only concern is that in doing this, you also ensure that you are not skipping over any necessary materials that your child will need to know. Your child can begin working whenever you want. The assignments that your child completes will be checked by you, not CHC. So you can begin the work whenever you wish.
I hope you have a good experience with this new venture.
God bless you and your family!