Boy, Oh Boy, Oh Boy Crafts: Free Half Apron Pattern and Tutorial. These make great teacher gifts!
Crafternoon project: DIY farmhouse apron from Gooseberry Patch
Super Cute Half Apron Pattern
Vintage Red & White with Floral Pattern and Checker Board Squares Half Apron
How to Make a Half Apron Tutorial with FREE PATTERN - WhatTheCraft.com
50's half-aprons with tie-pocket PATTERN/ TUTORIAL! - CLOTHING
Vintage Half Apron - Red Cardinal Bird Print - Holly Pattern - Christmas Apron Pinny by hurdyburdy on Etsy https://www.etsy.com/listing/258776136/vintage-half-apron-red-cardinal-bird
Link has a pattern for the cute little tie-pockets but not the whole apron (she just "eye-balled it" for the apron, which probably wouldn't be too hard)