4 weeks from life drawings...and plaster skull

[behemot5]

here is some works I drawn 3 weeks ago...I learn during evening at class of the evening (i'm not sur of the words...i mean i learn twice a week during the evening in an art school).
they are drawn in approximately 10 minutes so i would like to improve my way of rendering but i don't draw as quick as i must...
sorry for the bad quality of the pictures....
comments are welcome....
http://membres.lycos.fr/behemot5/beaux%20arts%202_0068.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0069.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0070.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0072.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0074.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0075.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0076.JPG
http://membres.lycos.fr/behemot5/beaux%20arts%202_0078.JPG

[behemot5]

drawn this during the 3 weeks after........;
http://membres.lycos.fr/behemot5/beaux-arts3_0122.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0123.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0124.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0125.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0126.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0127.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0128.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0129.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0130.JPG
http://membres.lycos.fr/behemot5/beaux-arts3_0131.JPG

[jetpack42]

cool bro. a good start. when you've got 10 minutes, which is not alot of time, try and get the whole form of whatever you want to get (the whole body? an entire segment), but get the whole piece layed out first, then go in secondly. thanks for sharing.

[behemot5]

jetpack: thanks for this comment... that's true i have some difficulties about finishing outlines first then draw in secondly....10 minutes is too short for me, so i really wanna learn more about rendering.... perhaps must i draw a part of it entirelly ( like you suggest) to experiment and continu to progress.... I will try what you suggest next thursday....
thanks a lot....

[behemot5]

drawn this at home from a plaster headbone.....the problem in my opinion come from the texture of the paper.....
http://membres.lycos.fr/behemot5/crane.jpg

[behemot5]

i drawn the plaster headbone one more time.... here is the result:
http://membres.lycos.fr/behemot5/crane2_0143.JPG
help is welcome....thanks