hi, Jasemacās post caught my eye, iāve not gotten to the C chord in the modules yet, but could you enlighten me please to what you mean by 1 4 5 in the key of C and so on, whats the 1 4 5 relating to? iām about to start learning a bit of theory, my Boss has just given me one of Justins books to have a look at, and iām going to start learning the pentatonic scale, but your comment Stitch has left me quite puzzled. 
@chubbyfingers Every key has 7 note and they are called intervals.
In the Key of C they are C D E F G A B and back to C. These intervals are numbered
1 2 3 4 5 6 7 every interval has a chord that goes with it. Without getting into to much
Theory these Chord in the Key of C are C Dm Em F G Am Bdim.
If you match each chord to itās interval number you will see the C is 1 F is 4 and G is 5.
Making a 1 4 5 progression.
In the key of G the 1 4 5 intervals are G is 1 C is 4 and D is 5. making the G C and D chords
the 1 4 5
Every Key has 7 different notes. The note and chord change with the Key but the intervals
stay the same
Scales are the same they are made from the intervals of each key.
The Major pentatonic scale uses the intervals of 1 2 3 5 6 of the 7 intervals of the major scale.
The minor pentatonic scale uses the 1 b3 4 5 b7 of the major scale.
Donāt worry if you donāt understand any of this. You will learn all of this in the theory course
and as you work through Justinās courses.
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ahhh, thanks Stitch, and no, i donāt understand it just yet but now i remember watching a youtube vid about this, mayāve been Guitar Academy or something, left me completely baffled, and as you say, i put it down to that itād make sense as i progress through.
thanks for your reply.
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HI. Been working through these courses since February. About two weeks per module. I am finding the song practice for this module particularly hard. I am sure the best advice is just keep pressing through. Took from Sunday until today to get the C Chord reliably sounding good. The changes in the songs are just very fast. Might be sticking around this module for some time.
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How long did it take you to play the c chord perfect. Iām on module 5 and know the fretting but canāt get it perfect every time. Do I need to play it perfect to move on to module 6?
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I donāt necessarily think you have to perfect it to move on, but itāll steadily get better and better with practice. Thereās a lot of Module 6 songs that employ the C chord while youāre picking up the G (the last big chord in Grade 1ā¦and a fairly easy one at that), so thereās no shortage of practice ahead to hone it. 
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No, and Justin says as much. If you want to get an idea whatās needed to move on, watch the Nitsuj practice videos (Justin learning left handed). Even when he passed on to Grade 2, his chords and changes werenāt spot on.
I agree with @Lefteris. Practice songs with the C chord. Iām still not great on the C chord but playing it in songs has helped.
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Thank you all for your help
It was a long time ago that I started out with the open C chord. My teacher was a folkie, so she had us banging out I-V two chord progression/songs. That means C & G chords, C is the I chord and G is the V chord. Most notably we worked through āThree Blind Miceā and āAunt Rhody.ā
Here are more recent I-V two chorders:
Jambalaya
Achy Breaky Heart
Paperback Writer
Born In The USA
Since we are talking I-V, you can transpose using the A-E or D-A chords that you already learned with Three Little Birds. You can look for others songs as well.
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Thank you
Hiya. I had the same issue as you and found I could get C perfect but not when changing to C during a song without fumbling.
What I did was practice Daft Punkās āGet Luckyā so much that if I ever hear that song again, Iāll tear my ears off!
Joking aside, itās a song I know well, has a quick-ish tempo and I treated it like a video game boss battle. Every time I failed, I cursed under my breath and then tried again, and again, and again.
This helped me nail going from Am to C which then helped me with changes from other chords to C.
Your mileage may vary of course, but this is the method that worked for me.
Thank you for your advice.
Can I find āGet Luckyā on Justinās module songs?
I found it! Thanksā¦ I will practice it.
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And people wonder why so many people give up learning an instrumentā¦
Even on the ear training exercises I refuse to do those simple, childrenās melodies. I work out surf tunes, movies themes and rock tunes with simple riff lines.
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Itās taken me 9 months to get anywhere close with the C chord and can just about get this now. Playing songs with the chord in it is the key as it forces you to do the changes.
Thanks for the support and suggestionsā¦ much appreciated
Same as whatās been suggested previously, I found I got the greatest benefit from playing songs with the c chord in them. Before you know it your fingers will unconsciously be making clean c chords