
    Write a function that validates whether a student's lesson tag follows the platform's required format of lowercase letters connected by underscores, which is essential for proper tracking of learning progress across modules. The function should return true if the lesson tag is correctly formatted (like "basic_algebra") and false otherwise.
    

    
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates whether a student's lesson tag follows the platform's required format of lowercase letters connected by underscores, which is essential for proper tracking of learning progress across modules. The function should return true if the lesson tag is correctly formatted (like "basic_algebra") and false otherwise.
    

    """
import re

def text_lowercase_underscore(text):
    """
    Write a function that validates whether a student's lesson tag follows the platform's required format of lowercase letters connected by underscores, which is essential for proper tracking of learning progress across modules. The function should return true if the lesson tag is correctly formatted (like "basic_algebra") and false otherwise.
    

    """
    patterns = '^[a-z]+_[a-z]+$'
    if re.search(patterns, text):
        return True
    else:
        return False