Well it depends on the level of education and the systems used. Most of the work is done on line and saved to a cloud, so processing power and memory does not to be that large
As a guide....Primary Level - Tablets, new from $1,000 up to $2,000 pesos, usually used with the family cellphone
Secondary - Notebooks, iPads etc used from $1,000 to new at $5,000 pesos and above
Prepa - Notebooks or laptops with new laptops at about $8,000 pesos
Of course used, re-builts and hand-me-downs also work well and we can do battery replacement and repairs very inexpensively .