The prime difficulty with making an effective search on esl-lounge Premium comes from the fact that we are dealing with PDF files which are password protected, so cannot be spidered and archived in a normal fashion as Google would spider and index web pages. So we have manually constructed a database, dividing every lesson plan into level, category, duration, etc and added a basic keyword search function too.
You can search for PDF lesson plans on esl-lounge Premium based on the following variables:
Type - At present, there are "General", Business and Young Learners lesson plans.
Duration - You can use this to find shorter lessons if you are pushed for time or longer lessons if you have a lengthy period to fill. Lessons are divided into short ("Under 50 Minutes"), medium ("50 to 70 Minutes") and long ("More than 70 Minutes").
Category - You can choose to find lessons based on which skills they help your students with: Listening, Reading, Role Play, Speaking, Topic, Vocabulary, Writing.
Level - All the lesson plans on Premium site are divided into four levels:
Keywords - It is important that you only choose one or two words for this keyword box. All words have to be present for a result to be returned. The search "vacation", for example, will return all lesson plans where vacations are used as a subject matter.