Take a trip down the Colorado river in the Grand Canyon and wonder at the awesome power of water! People and places -Physical geography - Rivers Learning Points River processes, such as erosion, transportation and deposition, can dramatically change the landscape. River features can include meanders and oxbow lakes. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.