Teacher needs laptop before new school year!

Hi there! I'm Courtney, a teacher who may end up teaching a majority of online classes this school year due to Covid-19. My goal is to create a classroom environment that children can feel safe to share in, wither it be physically at the school, or online, and I cannot provide this feeling to my students if they can't see the videos I share during my zoom calls, or hear my lessons due to my computer either shutting down on me, freezing, or choosing to disconnect in the middle of a class.  

Thank you everyone in advance for your help!!