Husband doesn't understand ovulation or TTC

My husband and I have been kind of trying for about 8 months now. I say kind of because he thinks BD one or 2 days during my fertile week will do the trick and it's a constant fight every month. After talking to him this morning about missing ovulation yet another month I am starting to think he doesnt completely understand ovulation and TTC. A lot of our friends have had unplanned pregnancies so I think he thinks it just happens and that hasn't been the case for us. I want to find some way to really help him understand without making him feel like he is back in school. Maybe if he has a better understanding of it all he will understand my frustration. Has anyone experienced this with their SO? Does anyone have any articles or even better videos that might help him understand without feeling like I am forcing him to learn?