Shapers

https://thefutureshapers.com/

manager

http://the-happy-manager.com/
https://www.managers.org.uk/
https://www.kbmanage.com/

Levels / Work / Functions Roles Skills and Changes

http://www.biz-development.com/PerformanceManagement/2.31.managerial-levels.htm

http://myeasymba.blogspot.in/2010/09/management-levels-and-management-skills.html
https://futureofworking.com/

http://www.referenceforbusiness.com/management/Log-Mar/Management-Levels.html 

Study Guide

http://www.managementstudyguide.com
http://www.managementstudyhq.com
https://mymanagementguide.com/

Roles / Pros and Cons / Examples / Video

https://study.com/academy/lesson/management-roles-and-principles.html
https://www.mindtools.com/pages/article/management-roles.htm
http://management.atwork-network.com/2008/04/15/mintzberg%E2%80%99s-10-managerial-roles/
http://www.youtube.com/watch?v=_NRWtd_SiU8 

Management Guru / Site / Thinkers / On Twitter

https://en.wikipedia.org/wiki/Business_guru
http://www.derekstockley.com.au/guru.html
http://www.thinkers50.com/
http://www.phdinmanagement.org/top-50-management-gurus-worth-following-on-twitter.html

Skills / Slides / Pros and Cons

http://www.articlesbase.com/management-articles/managerial-skills-708033.html
http://www.slideshare.net/melgazar/management-skills-3042878
http://www.rasmussen.edu/degrees/business/blog/different-management-styles/

Management styles / Details / Country / Change

https://en.wikipedia.org/wiki/Management_style
http://tutor2u.net/business/gcse/people_management_styles.htm
https://www.crossculture.com/uncategorized/6-leadership-styles-around-the-world-to-build-effective-multinational-teams/
http://www.inc.com/guides/201105/how-to-change-your-management-style_pagen_2.html

Free Podcasts from Top Business Schools

STANDFORD
The Entrepreneurial Thought Leaders
lecture series is a weekly podcast that covers a wide range of topics affecting today's entrepreneur. The free podcast takes place every Wednesday & can be subscribed via iTunes or RSS Feed.
HARVARD
The HBR IdeaCast from Harvard is a free podcast that features ideas and commentary from notable business leaders. There is a new episode every Thursday and old episodes are archived for easy listening. You can subscribe via iTunes.

https://hbr.org/
http://www.thecrimson.com/
https://www.harvard.edu/
http://harvardbusiness.org/

WHARTON
The Knowledge@Wharton now offers online content in an mp3 format. You can download the regular podcasts to your computer, mp3 player, or iPod. Topics cover everything imaginable and some podcasts include Q & A sessions with CEOs, faculty, and notable commentators.
Kellogg
http://www.kellogg.northwestern.edu/News-Events/Speaker_Videos.aspx

Mania

https://managementmania.com/

Functions

Management Functions

1. Planning, 
2. Organizing, 
3. Staffing, 
4. Directing, 
5. Coordinating,
6. Reporting &; 
7. Budgeting

Operative Functions

1. Human resource,
2. Operations,
3. Strategic,
4. Marketing,
5. Financial  
6. Systems 

degrees.

http://www.topmanagementdegrees.com/

Practical

http://www.practical-management.com/

Heaven

http://www.managementheaven.com/