Make a card in the shape of a big heart to go with it.
For added love, fill the sleeve with treats like chocolate, pens that actually write, a Starbucks gift card, hand lotion, and maybe some lavender-scented hand-sanitizer to help her stay well until summer!
<<< Retro & romantic
Amazon 15-in Rikki KnightTM Green Heart Owl on Deco Laptop/Notebook Sleeve, $37.99
For the wise, sweet teacher>
EO handsanitizer lavender-scented (also at Whole Foods)
Hearts, flowers, & butterflies for spring... (also comes in 26 other designs) >>
Other great gifts for Mom/teachers:
For a male teacher:
Leather Macbook sleeve
from Amazon, $15.50