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A hair follicle or HF is a small part of the skin that produces the hair shaft. Paul Gerson Unna was the first to observe a bulge in the human hair follicle's outer root sheath (ORS). The bulge is present between the sebaceous gland and the arrector pili muscle and is the niche for hair follicle stem cells (HFSCs). The bulge is also a niche for melanocyte stem cells, and their loss results in graying of hair. The HFSCs express Sox9 and Lhx2, which help them maintain stemness and prevent...
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Planning for learning involves the development of a teaching plan. Teaching plans are similar to nursing care plans—both follow the steps of the nursing process. Planning in the teaching process involves setting goals and outcomes. Here, goals identify what a patient needs to achieve to understand a healthcare topic better, whereas the outcomes are the action to be performed by the patient to achieve the goal within a timeframe. For example, if the goal is to educate the patient about...
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Stem cells are undifferentiated cells that divide and produce more stem cells or progenitor cells that differentiate into mature, specialized cell types. All the cells in the body are generated from stem cells in the early embryo, but small populations of stem cells are also present in many adult tissues including the bone marrow, brain, skin, and gut. These adult stem cells typically produce the various cell types found in that tissue—to replace cells that are damaged or to continuously...
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Stem cell research aims to find ways to use stem cells to regenerate and repair cellular damage. Over time, most adult cells undergo the wear and tear of aging and lose their ability to divide and repair themselves. Stem cells do not display a particular morphology or function. Adult stem cells, which exist as a small subset of cells in most tissues, keep dividing and can differentiate into a number of specialized cells generally formed by that tissue. These cells enable the body to renew and...
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Stem cells are undifferentiated cells that divide and produce different types of cells. Ordinarily, cells that have differentiated into a specific cell type are post-mitotic—that is, they no longer divide. However, scientists have found a way to reprogram these mature cells so that they “de-differentiate” and return to an unspecialized, proliferative state. These cells are also pluripotent like embryonic stem cells—able to produce all cell types—and are therefore...
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通过灵活的教学和专业发展,为未来的STEM教师做好准备.

Bennett B Goldberg1, Derek O Bruff2, Robin McC Greenler3

  • 1Department of Physics and Astronomy, Northwestern University, Evanston, IL, United States of America.

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数以千计的未来的STEM教师在全球范围内完成了大规模的开放在线课程 (MOOC) 和学习社区,增强了基于证据的教学实践. 这种混合方法为高等教育中的可扩展的专业发展提供了一个可持续的模型.

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科学领域:

  • 在STEM教育方面.
  • 高等教育教学的教学.
  • 教师专业发展学院的专业发展.

背景情况:

  • 未来的STEM教师需要有效的教学专业发展.
  • 传统的专业发展模式可能缺乏可扩展性和灵活性.
  • 基于证据的教学实践对于各种学生需求至关重要.

研究的目的:

  • 评估一种用于STEM教师教学专业发展的新型混合学习模型.
  • 评估大规模开放在线课程 (MOOC) 与面对面的学习社区相结合的可扩展性和可持续性.
  • 为提高本科生获得高质量的STEM教学的机会.

主要方法:

  • 在2014-2018年期间,通过MOOC提供了七个入门课程,并促进了面对面的学习社区.
  • 在全球范围内注册了14977名参与者.
  • 实现了11.5%的完成率 (1,725名参与者).

主要成果:

  • 观察到高水平的参与者参与和学习.
  • 混合方法证明了研究生和博士后的灵活性.
  • 利用教育技术和学习者人口统计学,证明了对大规模的专业发展的有效性.

结论:

  • 异步在线学习 (MOOC) 和结构化的面对面学习社区的结合是大规模STEM教师专业发展的可行和可持续模式.
  • 这一举措可以作为一个模型,为未来的STEM教育工作者增加获得基本教学准备的机会.
  • 有效的教师准备直接影响本科生STEM教学质量和学生的成功.