"I love [my] students so have to do [what] will make them understand [what I] am teaching."
Quartz Africa reports the school have had no computers since 2011, despite ICT being part of the school curriculum and students having to pass an exam on the subject to progress to high school.
Rebecca Enonchong, a tech entrepreneur from Cameroon, shared the image with Microsoft Africa on Twitter asking if they could give computers to the class.
"Hey @MicrosoftAfrica, he's teaching MS Word on a blackboard. Surely you can get him some proper resources," she tweeted.
Microsoft Africa responded by promising to provide a computer to the teacher and access to free professional development resources.
"Supporting teachers to enable digital transformation in education is at the core of what we do," responded the tech giant.
A 2015 study into the implementation of ICT learning in Ghanaian secondary schools found disparities in technology use among urban and rural school students.
The report, published in the journal Procedia - Social and Behavioral Sciences, found there was a "digital divide" in Ghana and called for government and school administrators to provide better technology resources for students.