Craig is correct, Manny. If you play a guitar, put a capo on the 5th fret. Anything you finger on the guitar after that will be in the same scale (different octave) as the Ukulele. The chord shapes are the same on a uke as they are on a guitar. With a uke tuned GCEA and a guitar tiuned EADGBE, the fingering:
An A on a uke fingers the same as an E on a guitar
A B on a uke fingers the same as an F# on a guitar
A Bb on a uke fingers the same as an F on a guitar
A C on a uke fingers the same as a G on a guitar
A C7 on a uke fingers the same as an G7 on a guitar
A D on a uke fingers the same as an A on a guitar
A D7 on a uke fingers the same as an A7 on a guitar
An E on a uke fingers the same as an B on a guitar
An F on a uke fingers the same as an C on a guitar
A G on a uke fingers the same as an D on a guitar
A G7 on a uke fingers the same as an D7 on a guitar
Here's a transposition wheel (circle of fifths) to change keys:
http://ukuleletonya.com/files/transposing_wheel.pdf
To demonstrate the chord shapes:
Ukulele Chords and guitar Chords have the same fingering on the Fretboard:
It's the same 12 Fret Octave. The Chord shapes are the same. Try This on Guitar:
[G][G][G] [C][C] [D][D][D] [C][C] [G]Hang [C]on [D]Sloopy, [C]Sloopy hang [G] on
Now, using the IDENTICAL FINGERING on a GCEA tuned Uke:
[C][C][C] [F][F] [G][G][G] [F][F] [C]Hang [F]on [G]Sloopy, [F]Sloopy hang [C] on
Try playing Wild Thing, to the same Chord progression.
Try playing Louie Louie, to the same Chord progression.
Try playing How Does it Feel, to the same Chord progression.
Do You see the Pattern? It's the same basic 1 4 5 Rock 'N Roll Progression that You can play Hundreds of songs to, with the same fingering as You are used to on Your Guitar. Try it and Enjoy!
Ukulele Tonya has a nice chord chart and lesson plan, here:
http://ukuleletonya.com/files/beginner_lesson_pkg.pdf