On this edition of Africa 54: In-classroom learning resumes in Zimbabwe as thousands of teachers call on the government to address their concerns over the coronavirus pandemic; Algeria, the last country in the world using leaded petrol, exhausted its stocks in July, ending a 19-year campaign to eradicate the poisonous substance from Africa and other parts of the world; & An offline mobile learning app, Inspire, makes e-learning more widely accessible for schools in remote villages.