Since 2002, over 210,000 12-15 year olds have told SHEU about their attitudes to lessons.
In 2011, up to 35% of older pupils reported enjoying ‘most’ school lessons.
Chart 1 shows responses to the five points on the 'All of them' to 'Hardly any' scale.
Chart 1. Results from 2011 - How many lessons do you enjoy at school?

Over the last ten years, Chart 2 (below), between 28% - 41% of 12-15 year olds say they enjoy ‘most / all’ school lessons with older pupils reporting slightly higher percentages. Also ...
-
Between 2% - 9% said that they enjoy all their school lessons
-
Around 32% said they enjoy half of their lessons
-
Between 7% - 19% said they enjoyed hardly any of their lessons
Chart 2. Results from 2002-2011 from 211,503 12-15 year olds who report enjoying ‘most / all’ school lessons

To read more about what young people say to SHEU about their lives, please follow this link.
See also -
There are a number of research studies into enjoyment of school lessons including:
How can we enhance enjoyment of secondary school?: the student view "Enjoyment of school tends to be promoted by factors such as successful social relationships, small classes, variation in learning, and students having some control of their learning."
School quality, child wellbeing and parents' satisfaction "Child wellbeing at school and enjoyment of the learning environment are important economic outcomes, in particular because a growing body of research shows they are strongly linked to later educational attainments and labour market success."