In Cameroon, primary school children did indeed come to school with miniature chalkboards, just like our great-grandparents did. It was also fairly common for families to use chalkboard paint on a plank of wood at home so the kids could do their math homework, etc. Students without this at home would stay around the school after hours to use their chalkboards.
In high school, students were expected to have a notebook for each subject- the cheapest would be basically tracing paper and go for around twenty cents for a hundred pages. Most students could not afford the school books, so instead the teacher would write the content of the book on the board and students would spend much of class copying it. The students would leave the center pages of the notebook blank so that they could neatly tear out double-sheets for tests. They’d always complain bitterly when I made them turn something in on their own paper.
Incidental school expenses- uniforms, paper, pens (about twenty cents a pop), etc. were a major problem for kids and were a big reason why kids would drop out even if they could afford the school fees. Even teachers were not immune. The only supply our school issued us was exactly one box of a chalk, which we were expected to nurse throughout the year (and the students would beg for our chalk stubs.) I remember a very ugly incident where the math teacher got in a screaming fight trying to get another box of chalk.