According to Wikipedia, Hashtags are intended for discussion of a particular event tend to use an obscure wording to avoid being caught up with generic conversations on similar subjects.
Hashtags are fun! They are everywhere. You'll be hard pressed to watch something on TV that doesn't include a hashtag on the screen. We see them all the time, but many don't really know what they are and what they are for. Hashtags are like labels for social media posts. It helps to categorize posts and make them more searchable. Hashtags are used to facilitate Twitter chats by having people follow hashtags at specific times and include the hashtag in your posts.
The evolving list below is designed to help you find hashtags that are relevant to your teaching assignment. Here are some education hashtags I recommend you follow. (not case sensitive) Happy searching!