The first thing must learn how student - it's good to see the structure of the words. He should be able to distinguish its parts, i.e. morphemes.
You also need to learn to identify the parts of speech and their grammatical characteristics.
And only then, when the student was able to name the part of speech and highlight the morpheme, where the letter is in a weak position and needs to be tested, it needs to think of the right word at the moment orfogramm. It turns out that without learning certain rules are not necessary. But it is necessary to understand their essence and to learn how to use.
So, if you need to check the spelling of the consonant in the prefix, you have to remember those that have constant writing. In case, if we are talking about consoles with the letters "z" and "s" at the end, you must remember the rule that the deaf "to" is written before any deaf consonants, and the voiced "z" - before all voiced consonants. For example, the word "expand" consonant in the prefix needs to be tested. Remembering the rule, you have to conclude that you need to write "s" after the console is ringing. And the word "make" is the prefix "C" as the prefix "s" does not exist. It's the constant writing that you want to remember. And the letter "z" at the beginning of a word is written only when it is part of the root.
The word "deploy" is another orfogramm. This spelling of the unstressed vowel in the root word. You can check, choosing cognates or changing the shape of the word so that the vowel was in a strong position, i.e. under stress. For the word "deploy" the test may be the word "detailed". In this vowel in the root is in a strong position, and, accordingly, the spelling matches the pronunciation.
In some cases, to check spelling, you need to determine the conjugation or declension, case, or number, etc. for Example, if you are in doubt of the spelling of endings as a noun, you need to identify the declension and case, and then you will apply a certain rule.