Three new articles have been published by International Journal of Mathematical Education in Science and Technology:

• A note on variance components model, by Anant M. Kshirsagar and R. Radhakrishnan
• An elementary proof of a converse mean-value theorem, by Ricardo Almeida
• Bionomic exploitation of a ratio-dependent predator-prey system, by Alakes Maiti, Bibek Patra and G.P. Samanta