Yes, good point about the math part. D22 took Algebra 1 in 6th, Geometry in 7th, Algebra 2 in 8th, and in order to make the IB math work, took a detour and took AP Stats in 9th (which in retrospect was a fantastic decision as it gave the framework for interpreting studies that rely on stats), and she tested out of IB Math SL in 11th (didn’t find out until 11th grade that the school was going to offer IB Math HL for this year’s 12th graders, and by then the path was already set). Currently taking AP Calc BC and will have a very solid math foundation entering college.
A very mathy student at our high school took AP Calc BC freshman year, IB Math SL sophomore year (students are allowed to take IB classes if they need to at our school, even if they are not IB students) and has been doing MVC at the local CC. The IBD was not a part of her pathway, and as her older brother went off to GT at 16 yrs old, her parents knew that IBD would not make sense for her either (she will also graduate at 16).