Thanks and a question on hours

Thanks to you both Cindy and Christie. In my heart I know it is the right way – I went to a CM primary school in England (where I am from) sadly my high school was not CM – so though I knew I loved the method, I had no idea where to begin with HS especially as my girls were in PS until recently and were only used to textbooks. You have been most encouraging. I think I will use the textbook obviously for math and maybe the Apolgia science and everything elseI will use a CM approach. I may have to give them a little grammar, as the PS seems to have left that out!! Any other advice would be appreciated and welcomed – I am grateful for a site like this, where we can glean info and encouragement. By the way how many hours do high school teens generally do when following a CM approach approximately, as I understand everyone may be a bit different?