Last Time
Previous Time
noun
The before time was last time or the previous time
ぜんかい
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
前回のじゅぎょうでは、カエルのかいぼうをしました。
Last class we dissected a frog.
それでは、前回のつづきからはじめたいと思います。
Okay so... we will continue from where we ended last time.
前回のレッスンの復習は家でちゃんとやってきましたか？
Did you guys review the last lesson at home properly?