Grade 7 · Social Studies · People, Population and Relationships (Origin of Money)
Barter: exchanging goods directly. Problems: double coincidence of wants, no common measure of value, goods cannot be divided or stored. Early money: cowrie shells, beads, cattle, salt, iron hoes. Then coins, paper money, cheques, cards and mobile money (e.g. M-Pesa). The Central Bank of Kenya issues currency.