scaffolding allows students to complete tasks

scaffolding allows students to complete tasks that they might have trouble with on their own. The classroom teacher works with the students first, and then allows them to work independently. If you would like to increase student learning of difficult concepts in your classroom, you might find that scaffolding works well. Scaffolding also allows students to feel successful and helps them teach other students.

Under UK law, the use of scaffolding used in construction is carried out under regulations introduced as part of the Work at Height regulations. Offshore scaffolding construction, alterations or dismantling are subject to extra design regulations as they are classified as outside basic design specifications.
The UK government's Health and Safety Executive (HSE) is the agency responsible for ensuring the safety of scaffolding. The construction industry is required to adhere to standards established under UK and European Union law when using scaffolding.
Design
The construction, alteration or dismantling of offshore scaffolding must be designed by a competent person to ensure the strength and stability of the scaffold at all times. The design should include the methods and sequence to be used in all phases of the use of scaffolding.
Inspection
All scaffolding used in the UK is required to be inspected by an individual assessed under the HSE's Construction Industry Scaffolder's Registration Scheme. Each group working on a scaffolding construction should include an individual qualified or with appropriate experience on the scaffolding installation being used.
http://www.shscaffolding.com/