It is important to spell words correctly in academic writing so your reader can be certain of what you are trying to say.
1. Proofreading your work when you have finished it will help you to identify if this is something you need to work on. Use the Proofreading guide for tips on the best ways to do this.
2. Developing strategies to help you remember hard to spell words makes it easier to remember them. Make up a mnemonic, a tool to help you remember something:
For example: a mnemonic for remembering how to spell ‘necessary’:
“It’s necessary that a shirt has one collar and two sleeves.”
This helps us to remember that ‘necessary’ has one ‘c’ (collar) and two ‘s’s (sleeves) (BBC Bitesize, no date).
Break the word into smaller sections, or by its syllables.
For example:
definitely = de + finite + ly
examination has 5 syllables = ex/am/in/a/tion
Find strategies that work to help you spell the words you find difficult.
3. Homophones are words that sound the same, but are spelt differently depending on their meaning. It's easy to use the wrong one! There, their, and they're are an example that are often muddled up. If this is something you do, make a note of the common errors to refer to when you are proofreading.

(Image from: TPT, no date).
Other examples include:
to, too, two;
where, wear, were;
aloud, allowed;
through, threw
This BBC Bitesize page lists many more homophones and explores some strategies to remember how to get them right.
4. Keep a dictionary to hand, so you can check words easily as you are writing. Well respected dictionaries can be found online, such as Collins, Oxford and Cambridge. Find one that suits you.
5. Find resources that will help you develop your spelling skills. How to Spell UK's webpage and YouTube channel are worth exploring as there are resources aimed at adults who want to improve.
6. Beware of American spellings! Set the spell-checker on Word (or whichever software you use) to UK English to make sure it identifies misspelt words correctly.