Intraoperative teaching is an essential surgical skill, but there is little literature regarding trainees acting as trainers; we characterised these cases in paediatric laparoscopic appendicectomy. This is a retrospective review of casenotes over two years (2015-2017) in a single tertiary paediatric surgical centre in the UK. Operating were: paediatric surgery Core Trainees (CT) (postgraduate year (PGY)3-4), Junior Registrars (JR) (PGY5-6) and Senior Registrars (SR) (PGY7+); collectively described as trainees. A total of 53 (20.7%) of 256 appendicectomies were trainee as trainer (TT) cases; 22 cases (41.5%) were performed by a CT supervised by a Registrar, and 31 (58.4%) by a JR supervised by a SR. Among the cases, 17 (32.1%) were complex, 47 (88.7%) were in working hours (8am-5pm), and 50 (94.3%) took place Monday to Friday. Median (interquartile range) duration of surgery was 65 (52-77) minutes. In the first year, 60 (47%) appendicectomies were performed by JRs. JR 1 was TT in three cases (8.8%) and JR 2 in five cases (19.2%); in all cases, the learner was a CT. Overall, there were 26 (10.6%) negative appendicectomies, 8 (3%) conversions, 19 (7%) readmissions within 30 days of discharge and 3 (1.1%) required reoperation; there was no statistically significant difference in complications between TT and non-TT cases. Laparoscopic appendicectomy is an excellent model for trainees to act as trainer; case selection included simple cases during daylight hours. Our outcomes are comparable with published literature, suggesting that this teaching method is safe for patients.