The Short Version
Tanzania's competence-based curriculum dates back to approximately 2005, not the 2020–2025 window stated in the claim. What occurred during 2020–2025 was a revised curriculum framework — approved by parliament in 2023 under the 2014 Education and Training Policy — with phased implementation still underway and full execution expected around 2027. Describing this as CBC being "introduced" in 2020–2025 omits two decades of prior CBC history and overstates the completeness of the recent reform rollout.