instruct in

instruct (someone) in (something)

To teach someone about something in particular (named after "in"). You need to instruct the temp in how to do the filing—otherwise, all this paperwork will be a mess when you get back from vacation.See also: instruct

instruct someone in something

to teach someone about something. Amy will instruct you in the way to hang paper. The manager instructed Ken in the best method of entering data into the computer.See also: instruct