Interactive maths lessons Crocodile Mathematics has developed software that enables students to create an interactive maths laboratory in the classroom, changing settings and specifications as they experiment with models that link shapes, equations, matrices, numbers and graphs. Eighty free lesson plans for key stages 3 and 4 are now available on the Crocodile Clips website. They need the software to be fully effective, but the site provides numerous useful ideas for teachers under clearly defined headings. There are also activities for pupils, ranging from setting friendly problems involving Cartesian co-ordinates to the addition and multiplication of vectors. For Crocodile Clips lesson plans - which are also available for technology, physics and chemistry - visit the website. www.crocodile-clips.comcrocodilemathematicsm3.htm