Tim Cook, Apple employees volunteer at San Jose elementary school for MLK Day

Source: Tim Cook via Twitter

Cook shared two pictures of the Santee Elementary event in a Twitter post. In one photo, Cook is seen refurbishing a wooden installation with a fellow Apple worker, while the other shows a group of students ready to paint campus buildings. Monday was a no school day for Santee.

"Proud to volunteer beside hundreds of Apple employees honoring #MLKDay at ConnectED partner Santee Elementary," the tweet reads.

President Barack Obama's ConnectED initiative, a joint effort involving the Federal Communications Commission and multiple corporations, seeks to provide high-speed Internet access to 99 percent of America's students by 2018. Apple is on the list of participating companies, along with Microsoft, Sprint, and Verizon, among others.

Apple pledged $100 million to the ConnectED program in 2014. Santee Elementary is one of 114 schools in 29 states that was given iPads for student use, while faculty received both MacBooks and iPads. The program also allots one Apple TV per classroom for in-class activities, as well as software serving educational and professional development.