Spelling Beez is a spelling application to test and improve your spelling skills. (English)You can create your own spelling list and it is very easy t...
İlköğretim 5. Sınıf Fen Bilimleri Eğitim Testleri;Artık Test Çözmeyi Eğlenceli Ve Pratik Bir Hale Getirdik.Fen Bilgisi Seviyenizi test ederken öğrenme...
This abacus was created by John Napier of Merchiston in 1617 for calculation of products and quotients of numbers. The method was based on Arab mathem...