Does anyone know of any implementation (in some form, maybe unfinished) of this for the web? I'm having a hard time searching for it. NaSC looks awesome but is

Does anyone know of any implementation (in some form, maybe unfinished) of this for the web? I'm having a hard time searching for it. NaSC looks awesome but is pretty hard to get running for a one-off lesson in schools (and for use by students at home).