Respond to these showcases www. ajplus. co. uk/ajdirect Readers may obtain information about these products by filling in the enquiry numbers on an AJ enquiry card. Advertisers wishing to promote their products on these pages should contact Chris Bond on 020 75056816 Suspended-ceiling-systems supplier Armstrong World Industries, has launched its newest continuing professional development seminar - a better learning environment. The presentation has been developed in response to changes in legislation regarding acoustics in classrooms.