MInDS visited City Neighbors High School on October 31st to show the students how Gram staining can be used to classify bacteria into two major groups. The students had grown bacteria swabbed from their phones, and during our visit they Gram stained these bacteria.
![Students in a classroom listen to a presentation about bacteria classification](https://sites.krieger.jhu.edu/minds/files/2023/11/DSC01524-1024x684.jpg)
![A petri dish with bacterial colonies next to a data collection sheet](https://sites.krieger.jhu.edu/minds/files/2023/11/DSC01539-1024x684.jpg)
![A student holds a slide they prepared with bacterial samples](https://sites.krieger.jhu.edu/minds/files/2023/11/DSC01529-1024x684.jpg)
![A student uses a dropper to add stains to a slide with bacteria](https://sites.krieger.jhu.edu/minds/files/2023/11/DSC01531-1024x684.jpg)
![Students observe their stained bacterial slides under the microscope](https://sites.krieger.jhu.edu/minds/files/2023/11/DSC01535-1024x684.jpg)