Here's a list of things to do with your spectrometer, whether you're a teacher, a hobbyist, or a grassroots scientist. Please add your own, and include how much time it'll take, an estimate of the cost, etc. 

##Activities##

###Measure sodium lines###

http://publiclaboratory.org/wiki/spectrometry-activity-sodium-lines

###Calibrate your spectrometer with a CFL bulb###

(Base this one on http://publiclaboratory.org/wiki/spectral-workbench-calibration but include more explanation etc)

###Measure an atmospheric absorption spectrum###

Find the [Frauenhofer lines](https://en.wikipedia.org/wiki/Fraunhofer_lines):

https://spectralworkbench.org/tag/sunlight
https://spectralworkbench.org/spectra/show/913 (especially good!)

Read more at: http://publiclaboratory.org/wiki/spectrometry-activity-atmospheric-absorption

-- add more activities here --