Learners will need the most updated PC version of Terraria, preferably. If they are using a different type of device then they will not be able to play with other students or join their worlds. Parents and learners should be aware that the Terraria PC version is the encouraged device/version of choice. There are limitations to the others and most learners will play on the PC and will likely be most satisfied with that experience. 

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Terraria Fandom

Terraria is appropriate for ages 11+. I strongly encourage parents to read the official game review and specifically "What Parents Need to  Know" section before having students play this game. The link is here: https://www.commonsensemedia.org/game-reviews/terraria

In order for students to play together, they must add each other as friends on Steam, myself included. It is very important that they obtain parent permission before adding others on Steam. Talking outside of he classroom on Steam is not encouraged in this class, so parents will need to discuss this with students and give permission if this is something they want to do.