Master 20 essential maths formulas in just 24 hours with a smart memory technique for fast learning and long-term recall.

This is the fifth of eight voiceless consonant programmes in our series of videos that explore the sounds of English. This is the fifth of seven short vowel programmes in our series of videos that ...

Check and improve your grammar with our basic grammar reference guide. On this page you'll find links to our basic grammar summary pages. Each basic grammar reference page covers a key grammar point ...

Functions and modules for creating metric (ISO) and English (UTS) standard screws and nuts. Included is a function for calculating the standard dimensions of screws including the tolerance values that ...

Cross threading occurs when the bolt is misaligned with the threads in the nut. It can destroy the threads, or cause the nut to jam. The standard beveled end process makes cross threading a ...