Below are some links we think may be of interest to you:
Department of Labour
NZQA
New Zealand Association of Registered Hairdressers
Rags to Riches - Ratios
Career Services
World of Hair
Alan D Hairdressing Salons and Schools
Western Australia Department of Training
BBC Skillswise
Vocational Numeracy Online (Competenz)
Simplifying ratios
Equivalent ratios
Communicating at work: Facilitating good communication
Spelling - A key to good communication
Maths4Life - fractions