The amount you will get paid depends on the amount earned and your tax code issued by HMRC.   

An example is If you work 20 days a month at £100 a day and are part of the Teachers pension scheme you are likely to get paid

                                                                                                                     £2000.00
Lees NI                                                                                                              165.60  
Less Pension contribution                                                                              220.00
Less Tax (assumimg you have standard tax allowance etc)                         139.54  
Take home before other deductions e.g. student loans                           £1474.86
                       

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