Couroutines not working in static class

Questions & Answers
1

This is giving me the following error, is there any workaround for this?

‘Assets/timeManager.cs(28,17): error CS0103: The name`StartCoroutine’ does not exist in the current context’

using UnityEngine;
using System;
using System.Collections;
using System.Collections.Generic;

public static class timeManager {

	private static float originalFixedDelta = Time.fixedDeltaTime;
	
	#region Internal Coroutines
	
	private static IEnumerator SlowMotionCurveCouroutine(float minTimeScale, float totalTime)
	{
		
		yield return null;
	}
	
	#endregion
	
	public static void SetTimescale(float newTimescale)
	{
		Time.timeScale = newTimescale;
		Time.fixedDeltaTime = newTimescale * originalFixedDelta;
	}
	
	public static void SlowMotionCurve(float minTimeScale, float totalTime)
	{
		StartCoroutine(SlowMotionCurve(minTimeScale, totalTime));
	}
	
}
2

Coroutines derive from MonoBehavior (Unity - Scripting API: MonoBehaviour)

This means that your class must similarly derive from MonoBehaviour, and the coroutine must be managed by an instance of a MonoBehaviour-derived class. In other words, you cannot start a coroutine from a static class. You could, for instance, define a singleton MonoBehaviour class to manage your couroutines, and then just call MyClass.Instance.StartCoroutine, and you can pass this a static IEnumerator. People have also built classes to wrap around and manage coroutines from static classes. This is the one I happen to use: http://forum.unity3d.com/threads/94220-A-more-flexible-coroutine-interface