play in the same league and so derby games are either arranged as pre-season friendlies or take place as part of the Challenge Cup. Junior rugby league Rugby league is played at a school level in many schools in the heartlands; recently it has been introduced into some schools outside the traditional areas in particular in London and Hertfordshire. The RFL uses two modified forms of rugby league created by ARL Development in Australia. Mini league (known as mini footy in Australia) is played by all children up to Year 4 of Primary School. It is designed to provide children with a safe environment, a firm knowledge of the laws of rugby league and a chance to practice the skills such as tackling, passing and common defensive and attacking tactics. Players up to and including Year 6 of Primary School play mod league. Mod league is a bridge between mini league and full contact rugby league. On completion of mod league, players make a move to full international rugby league laws. The Champion Schools tournament is a national competition for secondary schools. In the 2005/06 academic year over 1,200 teams and 20,000 players competed in the Champion Schools tournament, making it the largest rugby league competition in the world. Eighty percent of participants are new to rugby league. The growth of the Champion Schools tournament led to the creation of the Carnegie Champion Colleges competition for Years 12 and 13. The regionally based competition was introduced in 2008 and started in January. British Amateur Rugby League Association runs the Gilette National Youth League as well as the Yorkshire combination, Hull Youth and Junior and London Junior League. Super League and National League teams run academy sides to develop young talent. Players under the age of 21 years are eligible to play for the senior academy, the rules also permit three players over the age of 21 to play in academy matches. Junior academies are the second tier in the Youth Development system. Only players under the age of 18 years are eligible to play for the junior academy; no players over the age limit are allowed to play. Some of the better junior academy players may get experience in the senior academy and it is not uncommon for some players to play regularly in both junior and senior academies. Student Rugby League Although the game remains close to its working