Artemis BJJ (MYGYM Bristol), Can Sönmez, Bristol, UK - 28/11/2016
To escape the turtle position, your main options generally involve turning back to guard. If they leave enough space, you may be able to do a tight roll over your shoulder to swing your legs back into play. However, with a more experienced opponent, they will often be able to anticipate your roll and move around the side control.
Another option for when they are on your side starts by stepping your near side leg behind them. Cut your other knee in front, just past their knee. Block their other leg by grabbing it, then turn underneath. If they are smaller than you or the same size, you may be able to roll them right over and get side control. If not, then guard recovery should be possible, at the very least half guard.
Should they make the mistake of reaching deep with their arm, you have a simple method to get on top. Trap their elbow by bringing your same side arm back and wrapping it tight. Look away, kick back your same side leg and roll through, getting your weight up onto them. In wrestling, this is apparently called a 'Peterson roll'.
Teaching Notes: Main thing is does the arm across put you at risk of crucifixes? I think if you don't have it too low, you should be ok, keeping it more by the hip. Interestingly, Milka said the Peterson roll put her arm in a painful position, so I'll have to watch out for that. Shouldn't hurt, I'll have to video her when she next does it to check her placement.