The 49-year old left his role as Liverpool first team coach to take the reins at The Hawthorns in the summer and has the Baggies placed third on the Premier League table, just behind Manchester United and Manchester City.
Irish striker Long suggests there is plenty of confidence in the Albion camp at the moment and feels plenty of it has to do with the education the squad is gaining under Clarke.
"Technically we're well prepared for the games," said Long ahead of Wednesday's clash with Swansea City.
"We train all week long, all the sessions are brilliant and we learn every week.
"We have four or five sessions in the week where we're prepared for the team we're playing against and it shows on a Saturday.
"It's good for him (Clarke) we're doing so well because it shows how good a manager he is."