If you have an instrument at home, please continue practicing at home. Use the documents below for guidance. But even if you don't have an instrument, you should be practicing the following at home:
From the document "Tips for Playing at Home"
Breathing and counting exercises
Brass Players - Practice buzzing "in the air" in order to work on embouchure.
Brass Players - Practice the range and slurring exercises.
From the documents, "Scale Sheets" and "Fingering Charts"
Practice fingering the notes "in the air" or using an imaginary instrument (such as a ruler or a wooden spoon).
TIPS FOR PLAYING/PRACTICING AT HOME