Mr McClusky:

Mr McClusky (Steven Tandy) is Taylor, Hector, Brittany and Leon's teacher (and presumably Layla's old primary school teacher since in the episode "Taylor Turns Bad" he keeps saying her name and acts like he really knows her). He is wise and can be strict
at times (especially with Leon when he throws "air-born missiles"). Mr McClusky appears in every episode of series one (apart from "The Talk" but is absent in series two since Taylor, Hector, Brittany and Leon depart for high school at the end of series one (though he is mentioned briefly by Taylor in the first episode of series two "Little Fish" that Taylor misses him and his bush-walking socks to which Hector replies "Seriously?").