Update 'checking/intro-levels/01.md'

Issue 143
It talked about reaching or achieving checking levels. I changed it to be about using certain level checks to reach/achieve certain affirmation levels.

checking/intro-levels/01.md

@@ -11,7 +11,7 @@ The three affirmation levels are as follows:
 
 ### How Affirmation Levels Are Reached
 
-During a MAST workshop the translators engage in the checking steps (steps 5-8) as a team. This platform assures that the individual's work is edited by other members. Additionally, these steps give team members the responsibility of working together to agree on and affirm the final prodect. Once this is done, level one has been achieved. 
+During a MAST workshop the translators engage in the checking steps (steps 5-8) as a team. This platform assures that the individual's work is edited by other members. Additionally, these steps give team members the responsibility of working together to agree on and affirm the final product. Once this is done, Level One has been achieved. 
 
 Once Level One has been achieived, the team is encourageed to print or otherwise publish their translation so that it can be immediately useful. At this time they are also invited to upload their translation to the Wycliffe Associates content server. This provides for the next two checking levels. When the translation has been affirmed by church leaders and other Christian members of the community it is considered to have reached Level Two. Finally, some translation teams may wish to have their work reviewed and validated by a network of denominational leaders and scholars. If this is achieived the translation is considered to have reached Level Three.