Archived #LTHEchats were initially saved using Storify. This was a useful curation tool that gathered all of the tweets containing a chosen hashtag, but closed free access in May 2018.
We now archive tweets using Wakelet. Each week all of the #LTHEchat tweets are curated and these can be found on the LTHEchat Wakelet page.
#LTHEchat 