On this date in 1977 astronomers discover rings around Uranus.

Generic grid sheets with students names on them are useful for checking off homework and for classroom management tasks like behavior. You can make these with any spreadsheet.

Strange behavior with Macintosh computer programs can frequently be solved by throwing away the program's preferences file located in the preferences folder in the system folder. Doing this will often save you the trouble of having to reinstall the software again.

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