Reply To: Common Core State Standards
If these are truly abbreviations, I would double cap the abbreviation that consists of more than one letter. The rule about treating abbreviations mathematically only applies to a series of unspaced letters and numbers, not letters only. For abbreviations the effect of capitalization ends with anything that is not a letter, so you have to restate the caps after the period or hyphen. I would better be able to answer if I knew what K.NBT and A-CED stand for.
K.NBT [braille],k4,,nbt
A-CED [braille],a-,,ced