"Who taught English at your school?"
Translation:Kdo na vaší škole učil anglický jazyk?
You can replace vaší with tvojí or tvě. You can find full declension tables for pronouns at this handy site: https://en.wikipedia.org/wiki/Czech_declension#Pronouns.
anglický is an adjective (what kind of?), English language - anglický jazyk, English women - anglické ženy
anglicky is an adverb (how?), in English, English
You cannot use anglicky in this sentence. As I have pointed out to dsarkarati it means that the teacher did the teaching in English.
Yes, we know, the tiles only offer files for the main translation. As you can see above, that translation only contains "anglický" hence there is no reason for you to be offered "anglicky". If you want to be free in your answer, switch to keyboard input. You may have to do it in the web browser or get to a higher crown level.
FWIW, I do not see any really good translation with "anglicky" anyway as I explained to rosemarie45933 already. Using the adverb is debatable and ambiguous.