Then vs Than

We often write these both words in incorrect way. like;

If one cannot understand Wren and Martin than he should buy Easy grammar book. It is incorrect.

Than is used for comparisons.
Then is used for time expressions.

Usage.

Muslim history is more scoring than Indo-Pak-History.

If one has not more time then he should study and struggle harder.



practice vs practise


Practice is a noun


Practise is a verb


Usage

You should practise Essay writing for succeeding in English Essay.
You should put Essay writing into practice for succeeding in English Essay.