Here are some videos. You won't learn string theory just from watching them, but they can accompany a course or a self-study program, if you get Polchinski's book (with Matt Headrick's solution manual), BLT, or one of the many other books I refer to in the videos.

First version available: 0,1,2,3,4,8,11. To appear: 5,6,10,12,13,14,15.

0. Why string theory? -- see also Joe's website.

1. Classical string theory (Polchinski Ch.1.2)

2. Quantum string theory (non-covariantly) (Polchinski Ch.1.3)

3. Quantum Field Theory in 2D (Polchinski Ch.2.1-2.3)

4. Conformal Field Theory in 2D (Polchinski Ch.2)

5. Gauge fixing and ghosts [to appear] (Polchinski Ch.3)

6. BRST quantization [to appear] (Polchinski Ch.4).

7. General amplitudes [to appear] (Polchinski Ch.5).

8. String amplitudes at tree-level (Polchinski Ch. 6)

9. String amplitudes at loop-level [to appear] (Polchinski Ch.7).

10. Extra dimensions [to appear] (Polchinski Ch.8).

11. Strings and supersymmetry, part 1 (Polchinski Ch. 10,11)

12. Strings and supersymmetry, part 2 [to appear] (Polchinski Ch.10,11,12).

13. D-Branes [to appear](Polchinski Ch.13).

14. AdS/CFT: holography [to appear](Polchinski Ch.14).

15. Quantum black holes [to appear](Polchinski Ch.14).

Possibly useful mathematics:

M1. Green's functions

M2. Differential forms and cohomology

M3. Geometry and ODEs

M4. Dynamical systems

M5. Riemann surfaces

M6. Kronecker's limit formulas

25 student projects [in Swedish, so far].

Introductory notes, that lead to 4 warmup problems.

Polchinski reading guide [in Swedish, so far].

More background on some topics: [notes to appear]

- Anomalies
- Path integrals
- Renormalization group
- BRST
- Worldline formalism
- Riemann surfaces