I'd recommend RISC-V instead. It is close to MIPS assembly but more consistent without MIPS's quirks. I believe it has already replaced MIPS for teaching assem

I'd recommend RISC-V instead. It is close to MIPS assembly but more consistent without MIPS's quirks. I believe it has already replaced MIPS for teaching assembly language at many universities. Another one I've seen a lot is the 8-bit MCU Intel 8051.