Greek Alphabet
α Α alpha = a A
β Β beta = b B
γ Γ gamma = g G (hard g as in good)
δ Δ delta = d D
ε Ε epsilon = e E (short e as in get)
ζ Ζ zeta = z Z (ds)
η Η eta = e E (long e as in feet)
θ Θ theta = th Th
ι Ι iota = i I
κ Κ kappa = k K
λ Λ lambda = l L
μ Μ mu = m M
ν Ν nu = n N
ξ Ξ xi = x X (ks)
ο Ο omicron = o O (short o as in got)
π Π pi = p P
ρ Ρ rho = rh, r Rh, R
σ, ς Σ sigma = s S (ς only at the end of a word)
τ Τ tau = t T
υ Υ upsilon = u U
φ Φ phi = ph Ph
χ Χ chi = ch Ch (as in chorus)
ψ Ψ psi = ps Ps
ω Ω omega = o O (long o as in bone)
‛ over a vowel at the beginning of a word is equivalent to the letter h H e.g. ‛οδος (pronounced hodos); this is called a rough breathing
A good place to practise the letters of the Greek alphabet is the Open University website Introducing Ancient Greek: http://www.open.ac.uk/Arts/greek/#