From the PG:
The article describes the change as phasing out dual tracks (PSP and mainstream) leaving just CAS and PSP. Whatever the tracks are called, a more accurate description would be that the CAS/ PSP/ mainstream tracks are being changed to two levels, an regular level that blends mainstream and PSP students and an honors level that blends CAS and PSP students.
A change that the article for some reason fails to mention is that CAS classes will not be limited to 20 students. Instead of just looking the other way when classes exceed 20 students, PPS has come up with the justification that the regulations merely limit gifted classes to "20 gifted students"- meaning that the district can add to the 20 students identified as gifted. So, according to PPS, a class of 21 gifted students would not be permitted, but a class of 20 gifted students and 10 students not identified as gifted is fine. The overall goal for HS class size is 30 students.