  Contents:
  1. The sum rules or $\Gamma_{p,n}$.Theoretical status.
  2. Calculations of matrix elements over the polarized nucleon by the QCD sum
rule approach.
  3. Twist-4 corrections to $\Gamma_{p,n}$ from QCD sum rules.
  4. Gerasimov, Drell-Hearn (GDH) sum rules. The estimate of higher twist
corrections to $\Gamma_{p,n}$ using interpolation between $\Gamma_{p,n}$ and
GDH sum rules.
  5. Comparison with experiment.
  6. The calculations of polarized structure functions by the QCD sum rule
method.
  7. Calculation of the chirality violating structure function $h_1(x)$ by QCD
sum rules.
  8. Conclusions.
