The roles vary county to county, and tbh also school to school.
Sheffield's UNISOn produced a leafet which suggested:
TA 1
Working under direction/instruction
Supporting access to learning
Examples:
? Welfare/personal care
? Small groups/1 to 1
? General cleric
TA 2
Working under instruction/guidance
Enabling access to learning
Examples:
? Delivery of pre?determined learning/care/support programmes
? Implementing literacy/numeracy programmes
? Assisting with planning cycle
? Clerical/admin support for teacher/department
TA 3 including Cover Supervisors
(NB it is at the discretion of the headteacher whether a TA3 covers classes in the short term absence of a teacher)
Working under guidance
Delivering learning activities under the discretion of the teaching
Covering classes in short term absence (ie first day of illness) of the teacher, supervising work set by teacher, managing behaviour and setting expectations
Examples:
? Involvement in whole planning cycle
? Implementing work programmes
? Evaluation and record keeping
? Cover supervisor
? Specialist SEN/subject/other support
HLTA
Planning and delivering lessons including teaching activity (called “specified work”) whilst the class teacher has overall responsibility for progress
Examples:
? Delivering PPA cover
? Teaching (specified work) when there is a need for short term cover
? Planning and delivering learning activities with small identified groups
? Line managing TAs or Supervisory Assistants